Revert "Update SCVH InputTransferToken when available"

This revert was created by Android Culprit Assistant. The culprit was identified in the following culprit search session (http://go/aca-get/78a373af-3d5f-4015-a25e-bcb24843f6a9).

Bug: 405254118
Signed-off-by: boq-android-culprit-assistant@system.gserviceaccount.com
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:c77468cfe08273d1d568e71e17b5fc4e20b8f6ff)
Merged-In: Id09afebdfdb16d58c17da55c070a023e9aca9a1a
Change-Id: Id09afebdfdb16d58c17da55c070a023e9aca9a1a

14 files changed, 45 insertions, 157 deletions

diff --git a/core/java/android/view/ISurfaceControlViewHost.aidl b/core/java/android/view/ISurfaceControlViewHost.aidl
index 83aceb3f9a7d..fd4b329570d9 100644
--- a/core/java/android/view/ISurfaceControlViewHost.aidl
+++ b/core/java/android/view/ISurfaceControlViewHost.aidl
@@ -21,7 +21,6 @@ import android.graphics.Rect;
 import android.view.InsetsState;
 import android.view.ISurfaceControlViewHostParent;
 import android.window.ISurfaceSyncGroup;
-import android.window.InputTransferToken;
 
 /**
  * API from content embedder back to embedded content in SurfaceControlViewHost
@@ -33,7 +32,6 @@ interface ISurfaceControlViewHost {
      * APIs that are blocking
      */
     oneway void onConfigurationChanged(in Configuration newConfig);
-    oneway void onDispatchAttachedToWindow(in InputTransferToken token);
     oneway void onDispatchDetachedFromWindow();
     oneway void onInsetsChanged(in InsetsState state, in Rect insetFrame);
     ISurfaceSyncGroup getSurfaceSyncGroup();
diff --git a/core/java/android/view/IWindowSession.aidl b/core/java/android/view/IWindowSession.aidl
index a029303611c0..ab656ebc6492 100644
--- a/core/java/android/view/IWindowSession.aidl
+++ b/core/java/android/view/IWindowSession.aidl
@@ -313,9 +313,8 @@ interface IWindowSession {
     /**
      * Update the flags on an input channel associated with a particular surface.
      */
-    oneway void updateInputChannel(in IBinder channelToken,
-            in @nullable InputTransferToken hostInputTransferToken,
-            int displayId, in SurfaceControl surface, int flags, int privateFlags, int inputFeatures,
+    oneway void updateInputChannel(in IBinder channelToken, int displayId,
+            in SurfaceControl surface, int flags, int privateFlags, int inputFeatures,
             in Region region);
 
     /**
diff --git a/core/java/android/view/SurfaceControlViewHost.java b/core/java/android/view/SurfaceControlViewHost.java
index ecbf1f65f810..04ec4d0d382d 100644
--- a/core/java/android/view/SurfaceControlViewHost.java
+++ b/core/java/android/view/SurfaceControlViewHost.java
@@ -79,20 +79,6 @@ public class SurfaceControlViewHost {
         }
 
         @Override
-        public void onDispatchAttachedToWindow(InputTransferToken hostInputTransferToken) {
-            boolean hostInputTransferTokenChanged =
-                    !Objects.equals(hostInputTransferToken, mWm.mHostInputTransferToken);
-            if (!hostInputTransferTokenChanged) {
-                return;
-            }
-
-            mWm.setHostInputTransferToken(hostInputTransferToken);
-            if (mViewRoot != null && mViewRoot.mView != null) {
-                mWm.updateInputChannel(getWindowToken().asBinder());
-            }
-        }
-
-        @Override
         public void onDispatchDetachedFromWindow() {
             if (mViewRoot == null) {
                 return;
diff --git a/core/java/android/view/SurfaceView.java b/core/java/android/view/SurfaceView.java
index 94e9aa709369..29008d31990d 100644
--- a/core/java/android/view/SurfaceView.java
+++ b/core/java/android/view/SurfaceView.java
@@ -16,7 +16,6 @@
 
 package android.view;
 
-
 import static android.view.flags.Flags.FLAG_DEPRECATE_SURFACE_VIEW_Z_ORDER_APIS;
 import static android.view.flags.Flags.FLAG_SURFACE_VIEW_GET_SURFACE_PACKAGE;
 import static android.view.flags.Flags.FLAG_SURFACE_VIEW_SET_COMPOSITION_ORDER;
@@ -24,8 +23,6 @@ import static android.view.WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
 import static android.view.WindowManagerPolicyConstants.APPLICATION_MEDIA_OVERLAY_SUBLAYER;
 import static android.view.WindowManagerPolicyConstants.APPLICATION_MEDIA_SUBLAYER;
 import static android.view.WindowManagerPolicyConstants.APPLICATION_PANEL_SUBLAYER;
-import static android.view.flags.Flags.FLAG_SURFACE_VIEW_GET_SURFACE_PACKAGE;
-import static android.view.flags.Flags.FLAG_SURFACE_VIEW_SET_COMPOSITION_ORDER;
 
 import android.annotation.FlaggedApi;
 import android.annotation.FloatRange;
@@ -62,7 +59,6 @@ import android.util.Log;
 import android.view.SurfaceControl.Transaction;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.accessibility.IAccessibilityEmbeddedConnection;
-import android.window.InputTransferToken;
 import android.window.SurfaceSyncGroup;
 
 import com.android.graphics.hwui.flags.Flags;
@@ -351,7 +347,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
                     sv.mSurfacePackage.getRemoteInterface().attachParentInterface(this);
                     mSurfaceView = sv;
                 } catch (RemoteException e) {
-                    Log.d(TAG, "Failed to attach parent interface to SCVH. Likely SCVH is already "
+                    Log.d(TAG, "Failed to attach parent interface to SCVH. Likely SCVH is alraedy "
                             + "dead.");
                 }
             }
@@ -496,37 +492,10 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
         mTag = "SV[" + System.identityHashCode(this) + windowName + "]";
     }
 
-    private void dispatchScvhAttachedToHost() {
-        final ViewRootImpl viewRoot = getViewRootImpl();
-        if (viewRoot == null) {
-            return;
-        }
-
-        IBinder inputToken = viewRoot.getInputToken();
-        if (inputToken == null) {
-            // We don't have an input channel so we can't transfer focus or active
-            // touch gestures to embedded.
-            return;
-        }
-
-        try {
-            mSurfacePackage
-                    .getRemoteInterface()
-                    .onDispatchAttachedToWindow(new InputTransferToken(inputToken));
-        } catch (RemoteException e) {
-            Log.d(TAG,
-                    "Failed to onDispatchAttachedToWindow to SCVH. Likely SCVH is already "
-                            + "dead.");
-        }
-    }
-
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
         setTag();
-        if (mSurfacePackage != null) {
-            dispatchScvhAttachedToHost();
-        }
         getViewRootImpl().addSurfaceChangedCallback(this);
         mWindowStopped = false;
         mViewVisibility = getVisibility() == VISIBLE;
@@ -2220,7 +2189,6 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
             applyTransactionOnVriDraw(transaction);
         }
         mSurfacePackage = p;
-        dispatchScvhAttachedToHost();
         mSurfaceControlViewHostParent.attach(this);
 
         if (isFocused()) {
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index b1676dde3b70..2d62ed8c3ffc 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -37,8 +37,8 @@ import static android.view.Surface.FRAME_RATE_CATEGORY_HIGH_HINT;
 import static android.view.Surface.FRAME_RATE_CATEGORY_LOW;
 import static android.view.Surface.FRAME_RATE_CATEGORY_NORMAL;
 import static android.view.Surface.FRAME_RATE_CATEGORY_NO_PREFERENCE;
-import static android.view.Surface.FRAME_RATE_COMPATIBILITY_AT_LEAST;
 import static android.view.Surface.FRAME_RATE_COMPATIBILITY_FIXED_SOURCE;
+import static android.view.Surface.FRAME_RATE_COMPATIBILITY_AT_LEAST;
 import static android.view.View.FRAME_RATE_CATEGORY_REASON_BOOST;
 import static android.view.View.FRAME_RATE_CATEGORY_REASON_CONFLICTED;
 import static android.view.View.FRAME_RATE_CATEGORY_REASON_INTERMITTENT;
@@ -2704,8 +2704,7 @@ public final class ViewRootImpl implements ViewParent,
             mStopped = stopped;
             final ThreadedRenderer renderer = mAttachInfo.mThreadedRenderer;
             if (renderer != null) {
-                if (DEBUG_DRAW)
-                    Log.d(mTag, "WindowStopped on " + getTitle() + " set to " + mStopped);
+                if (DEBUG_DRAW) Log.d(mTag, "WindowStopped on " + getTitle() + " set to " + mStopped);
                 renderer.setStopped(mStopped);
             }
             if (!mStopped) {
diff --git a/core/java/android/view/WindowlessWindowManager.java b/core/java/android/view/WindowlessWindowManager.java
index 5af4abd1f608..a5ab917c267d 100644
--- a/core/java/android/view/WindowlessWindowManager.java
+++ b/core/java/android/view/WindowlessWindowManager.java
@@ -89,7 +89,7 @@ public class WindowlessWindowManager implements IWindowSession {
     protected final SurfaceControl mRootSurface;
     private final Configuration mConfiguration;
     private final IWindowSession mRealWm;
-    InputTransferToken mHostInputTransferToken;
+    final InputTransferToken mHostInputTransferToken;
     private final InputTransferToken mInputTransferToken = new InputTransferToken();
     private InsetsState mInsetsState;
     private final ClientWindowFrames mTmpFrames = new ClientWindowFrames();
@@ -128,11 +128,9 @@ public class WindowlessWindowManager implements IWindowSession {
         return null;
     }
 
-    void setHostInputTransferToken(InputTransferToken token) {
-        mHostInputTransferToken = token;
-    }
-
-    /** Utility API. */
+    /**
+     * Utility API.
+     */
     void setCompletionCallback(IBinder window, ResizeCompleteCallback callback) {
         if (mResizeCompletionForWindow.get(window) != null) {
             Log.w(TAG, "Unsupported overlapping resizes");
@@ -153,25 +151,11 @@ public class WindowlessWindowManager implements IWindowSession {
                 return;
             }
             state.mInputRegion = region != null ? new Region(region) : null;
-            updateInputChannel(window);
-        }
-    }
-
-    protected void updateInputChannel(IBinder window) {
-        State state;
-        synchronized (this) {
-            // Do everything while locked so that we synchronize with relayout. This should be a
-            // very infrequent operation.
-            state = mStateForWindow.get(window);
-            if (state == null) {
-                return;
-            }
             if (state.mInputChannelToken != null) {
                 try {
-                    mRealWm.updateInputChannel(state.mInputChannelToken, mHostInputTransferToken,
-                            state.mDisplayId, state.mSurfaceControl, state.mParams.flags,
-                            state.mParams.privateFlags, state.mParams.inputFeatures,
-                            state.mInputRegion);
+                    mRealWm.updateInputChannel(state.mInputChannelToken, state.mDisplayId,
+                            state.mSurfaceControl, state.mParams.flags, state.mParams.privateFlags,
+                            state.mParams.inputFeatures, state.mInputRegion);
                 } catch (RemoteException e) {
                     Log.e(TAG, "Failed to update surface input channel: ", e);
                 }
@@ -190,7 +174,9 @@ public class WindowlessWindowManager implements IWindowSession {
         }
     }
 
-    /** IWindowSession implementation. */
+    /**
+     * IWindowSession implementation.
+     */
     @Override
     public int addToDisplay(IWindow window, WindowManager.LayoutParams attrs,
             int viewVisibility, int displayId, @InsetsType int requestedVisibleTypes,
@@ -451,15 +437,14 @@ public class WindowlessWindowManager implements IWindowSession {
         if ((attrChanges & inputChangeMask) != 0 && state.mInputChannelToken != null) {
             try {
                 if (mRealWm instanceof IWindowSession.Stub) {
-                    mRealWm.updateInputChannel(state.mInputChannelToken, mHostInputTransferToken,
-                            state.mDisplayId,
+                    mRealWm.updateInputChannel(state.mInputChannelToken, state.mDisplayId,
                             new SurfaceControl(sc, "WindowlessWindowManager.relayout"),
                             attrs.flags, attrs.privateFlags, attrs.inputFeatures,
                             state.mInputRegion);
                 } else {
-                    mRealWm.updateInputChannel(state.mInputChannelToken, mHostInputTransferToken,
-                            state.mDisplayId, sc, attrs.flags, attrs.privateFlags,
-                            attrs.inputFeatures, state.mInputRegion);
+                    mRealWm.updateInputChannel(state.mInputChannelToken, state.mDisplayId, sc,
+                            attrs.flags, attrs.privateFlags, attrs.inputFeatures,
+                            state.mInputRegion);
                 }
             } catch (RemoteException e) {
                 Log.e(TAG, "Failed to update surface input channel: ", e);
@@ -639,9 +624,8 @@ public class WindowlessWindowManager implements IWindowSession {
     }
 
     @Override
-    public void updateInputChannel(IBinder channelToken, InputTransferToken hostInputToken,
-            int displayId, SurfaceControl surface, int flags, int privateFlags, int inputFeatures,
-            Region region) {
+    public void updateInputChannel(IBinder channelToken, int displayId, SurfaceControl surface,
+            int flags, int privateFlags, int inputFeatures, Region region) {
     }
 
     @Override
diff --git a/core/java/android/window/flags/window_surfaces.aconfig b/core/java/android/window/flags/window_surfaces.aconfig
index 7550a6360ee9..d2901a4a5d74 100644
--- a/core/java/android/window/flags/window_surfaces.aconfig
+++ b/core/java/android/window/flags/window_surfaces.aconfig
@@ -126,15 +126,3 @@ flag {
         purpose: PURPOSE_BUGFIX
     }
 }
-
-flag {
-    name: "update_host_input_transfer_token"
-    namespace: "window_surfaces"
-    description: "Update host InpuTransferToken on view attach"
-    is_fixed_read_only: true
-    is_exported: true
-    bug: "392965431"
-    metadata {
-        purpose: PURPOSE_BUGFIX
-    }
-}
\ No newline at end of file
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/letterbox/LetterboxInputDetector.kt b/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/letterbox/LetterboxInputDetector.kt
index bcbe123eb5e6..812cc0161aae 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/letterbox/LetterboxInputDetector.kt
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/letterbox/LetterboxInputDetector.kt
@@ -167,7 +167,6 @@ class LetterboxInputDetector(
 
                 windowSession.updateInputChannel(
                     inputChannel.token,
-                    null /* hostInputTransferToken */,
                     displayId,
                     inputSurface,
                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
index 97a47c602bcd..c2b8c55fb0ef 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
@@ -23,12 +23,12 @@ import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERL
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_INPUT_CONSUMER;
 
-import static com.android.wm.shell.desktopmode.DesktopModeEventLogger.Companion.ResizeTrigger;
 import static com.android.wm.shell.protolog.ShellProtoLogGroup.WM_SHELL_DESKTOP_MODE;
 import static com.android.wm.shell.windowdecor.DragPositioningCallback.CTRL_TYPE_BOTTOM;
 import static com.android.wm.shell.windowdecor.DragPositioningCallback.CTRL_TYPE_LEFT;
 import static com.android.wm.shell.windowdecor.DragPositioningCallback.CTRL_TYPE_RIGHT;
 import static com.android.wm.shell.windowdecor.DragPositioningCallback.CTRL_TYPE_TOP;
+import static com.android.wm.shell.desktopmode.DesktopModeEventLogger.Companion.ResizeTrigger;
 import static com.android.wm.shell.windowdecor.DragResizeWindowGeometry.isEdgeResizePermitted;
 import static com.android.wm.shell.windowdecor.DragResizeWindowGeometry.isEventFromTouchscreen;
 
@@ -342,7 +342,6 @@ class DragResizeInputListener implements AutoCloseable {
         try {
             mWindowSession.updateInputChannel(
                     mInputChannel.getToken(),
-                    null /* hostInputToken */,
                     mDisplayId,
                     mDecorationSurface,
                     FLAG_NOT_FOCUSABLE,
@@ -384,7 +383,6 @@ class DragResizeInputListener implements AutoCloseable {
         try {
             mWindowSession.updateInputChannel(
                     mSinkInputChannel.getToken(),
-                    null /* hostInputToken */,
                     mDisplayId,
                     mInputSinkSurface,
                     FLAG_NOT_FOCUSABLE,
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/compatui/letterbox/LetterboxInputControllerTest.kt b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/compatui/letterbox/LetterboxInputControllerTest.kt
index 9c45cd22db19..43b934cfbe27 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/compatui/letterbox/LetterboxInputControllerTest.kt
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/compatui/letterbox/LetterboxInputControllerTest.kt
@@ -192,7 +192,6 @@ class LetterboxInputControllerTest : ShellTestCase() {
         fun checkUpdateSessionRegion(times: Int = 1, displayId: Int = DISPLAY_ID, region: Region) {
             verify(windowSession, times(times)).updateInputChannel(
                 any(),
-                anyOrNull(),
                 eq(displayId),
                 any(),
                 any(),
diff --git a/services/core/java/com/android/server/wm/EmbeddedWindowController.java b/services/core/java/com/android/server/wm/EmbeddedWindowController.java
index 1bf65d1e3536..7104c7e22a4e 100644
--- a/services/core/java/com/android/server/wm/EmbeddedWindowController.java
+++ b/services/core/java/com/android/server/wm/EmbeddedWindowController.java
@@ -240,10 +240,9 @@ class EmbeddedWindowController {
 
     static class EmbeddedWindow implements InputTarget {
         final IBinder mClient;
-        @Nullable WindowState mHostWindowState;
+        @Nullable final WindowState mHostWindowState;
         @Nullable final ActivityRecord mHostActivityRecord;
-        String mName;
-        final String mInputHandleName;
+        final String mName;
         final int mOwnerUid;
         final int mOwnerPid;
         final WindowManagerService mWmService;
@@ -281,12 +280,13 @@ class EmbeddedWindowController {
          * @param displayId used for focus requests
          */
         EmbeddedWindow(Session session, WindowManagerService service, IBinder clientToken,
-                       @Nullable WindowState hostWindowState, int ownerUid, int ownerPid,
-                       int windowType, int displayId, InputTransferToken inputTransferToken,
-                       String inputHandleName, boolean isFocusable) {
+                       WindowState hostWindowState, int ownerUid, int ownerPid, int windowType,
+                       int displayId, InputTransferToken inputTransferToken, String inputHandleName,
+                       boolean isFocusable) {
             mSession = session;
             mWmService = service;
             mClient = clientToken;
+            mHostWindowState = hostWindowState;
             mHostActivityRecord = (mHostWindowState != null) ? mHostWindowState.mActivityRecord
                     : null;
             mOwnerUid = ownerUid;
@@ -294,9 +294,11 @@ class EmbeddedWindowController {
             mWindowType = windowType;
             mDisplayId = displayId;
             mInputTransferToken = inputTransferToken;
+            final String hostWindowName =
+                    (mHostWindowState != null) ? "-" + mHostWindowState.getWindowTag().toString()
+                            : "";
             mIsFocusable = isFocusable;
-            mInputHandleName = inputHandleName;
-            updateHost(hostWindowState);
+            mName = "Embedded{" + inputHandleName + hostWindowName + "}";
         }
 
         @Override
@@ -485,19 +487,5 @@ class EmbeddedWindowController {
             proto.end(token2);
             proto.end(token);
         }
-
-        public void updateHost(WindowState hostWindowState) {
-            if (mHostWindowState == hostWindowState && mName != null) {
-                return;
-            }
-
-            ProtoLog.d(WM_DEBUG_EMBEDDED_WINDOWS, "[%s] Updated host window from %s to %s",
-                    this, mHostWindowState, hostWindowState);
-            mHostWindowState = hostWindowState;
-            final String hostWindowName =
-                    (mHostWindowState != null) ? "-" + mHostWindowState.getWindowTag().toString()
-                            : "";
-            mName = "Embedded{" + mInputHandleName + hostWindowName + "}";
-        }
     }
 }
diff --git a/services/core/java/com/android/server/wm/Session.java b/services/core/java/com/android/server/wm/Session.java
index c5b47f9f4256..390132445ba8 100644
--- a/services/core/java/com/android/server/wm/Session.java
+++ b/services/core/java/com/android/server/wm/Session.java
@@ -916,16 +916,10 @@ class Session extends IWindowSession.Stub implements IBinder.DeathRecipient {
             int privateFlags, int inputFeatures, int type, IBinder windowToken,
             InputTransferToken inputTransferToken, String inputHandleName,
             InputChannel outInputChannel) {
-        if (!Flags.updateHostInputTransferToken()) {
-            // This is not a valid security check, callers can pass in a bogus token. If the
-            // token is not known to wm, then input APIs is request focus or transferTouchGesture
-            // will fail. Removing this check allows SCVH to be created before associating with a
-            // host window.
-            if (hostInputTransferToken == null && !mCanAddInternalSystemWindow) {
-                // Callers without INTERNAL_SYSTEM_WINDOW permission cannot grant input channel to
-                // embedded windows without providing a host window input token
-                throw new SecurityException("Requires INTERNAL_SYSTEM_WINDOW permission");
-            }
+        if (hostInputTransferToken == null && !mCanAddInternalSystemWindow) {
+            // Callers without INTERNAL_SYSTEM_WINDOW permission cannot grant input channel to
+            // embedded windows without providing a host window input token
+            throw new SecurityException("Requires INTERNAL_SYSTEM_WINDOW permission");
         }
 
         final long identity = Binder.clearCallingIdentity();
@@ -940,14 +934,12 @@ class Session extends IWindowSession.Stub implements IBinder.DeathRecipient {
     }
 
     @Override
-    public void updateInputChannel(IBinder channelToken,
-            @Nullable InputTransferToken hostInputTransferToken,
-            int displayId, SurfaceControl surface,
+    public void updateInputChannel(IBinder channelToken, int displayId, SurfaceControl surface,
             int flags, int privateFlags, int inputFeatures, Region region) {
         final long identity = Binder.clearCallingIdentity();
         try {
-            mService.updateInputChannel(channelToken, hostInputTransferToken, displayId, surface,
-                    flags, mCanAddInternalSystemWindow ? privateFlags : 0, inputFeatures, region);
+            mService.updateInputChannel(channelToken, displayId, surface, flags,
+                    mCanAddInternalSystemWindow ? privateFlags : 0, inputFeatures, region);
         } finally {
             Binder.restoreCallingIdentity(identity);
         }
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index aa5eb33d8069..d25987028199 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -9418,12 +9418,10 @@ public class WindowManagerService extends IWindowManager.Stub
 
     /**
      * Updates the flags on an existing surface's input channel. This assumes the surface provided
-     * is the one associated with the provided input-channel. If this isn't the case, behavior is
-     * undefined.
+     * is the one associated with the provided input-channel. If this isn't the case, behavior
+     * is undefined.
      */
-    void updateInputChannel(IBinder channelToken,
-            @Nullable InputTransferToken hostInputTransferToken, int displayId,
-            SurfaceControl surface,
+    void updateInputChannel(IBinder channelToken, int displayId, SurfaceControl surface,
             int flags, int privateFlags, int inputFeatures, Region region) {
         final InputApplicationHandle applicationHandle;
         final String name;
@@ -9437,11 +9435,6 @@ public class WindowManagerService extends IWindowManager.Stub
             name = win.toString();
             applicationHandle = win.getApplicationHandle();
             win.setIsFocusable((flags & FLAG_NOT_FOCUSABLE) == 0);
-            if (Flags.updateHostInputTransferToken()) {
-                WindowState hostWindowState = hostInputTransferToken != null
-                        ? mInputToWindowMap.get(hostInputTransferToken.getToken()) : null;
-                win.updateHost(hostWindowState);
-            }
         }
 
         updateInputChannel(channelToken, win.mOwnerUid, win.mOwnerPid, displayId, surface, name,
diff --git a/services/tests/wmtests/src/com/android/server/wm/WindowManagerServiceTests.java b/services/tests/wmtests/src/com/android/server/wm/WindowManagerServiceTests.java
index 7836ca7d1b4d..9645e184d99c 100644
--- a/services/tests/wmtests/src/com/android/server/wm/WindowManagerServiceTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/WindowManagerServiceTests.java
@@ -1147,8 +1147,7 @@ public class WindowManagerServiceTests extends WindowTestsBase {
                 argThat(h -> (h.inputConfig & InputConfig.SPY) == 0));
 
         assertThrows(IllegalArgumentException.class, () ->
-                mWm.updateInputChannel(inputChannel.getToken(), null /* hostInputToken */,
-                        DEFAULT_DISPLAY, surfaceControl,
+                mWm.updateInputChannel(inputChannel.getToken(), DEFAULT_DISPLAY, surfaceControl,
                         FLAG_NOT_FOCUSABLE, PRIVATE_FLAG_TRUSTED_OVERLAY, INPUT_FEATURE_SPY,
                         null /* region */));
     }
@@ -1171,8 +1170,7 @@ public class WindowManagerServiceTests extends WindowTestsBase {
                 eq(surfaceControl),
                 argThat(h -> (h.inputConfig & InputConfig.SPY) == 0));
 
-        mWm.updateInputChannel(inputChannel.getToken(), null /* hostInputToken */,
-                DEFAULT_DISPLAY, surfaceControl,
+        mWm.updateInputChannel(inputChannel.getToken(), DEFAULT_DISPLAY, surfaceControl,
                 FLAG_NOT_FOCUSABLE, PRIVATE_FLAG_TRUSTED_OVERLAY, INPUT_FEATURE_SPY,
                 null /* region */);
         verify(mTransaction).setInputWindowInfo(
@@ -1199,8 +1197,7 @@ public class WindowManagerServiceTests extends WindowTestsBase {
                 eq(surfaceControl),
                 argThat(h -> (h.inputConfig & InputConfig.SENSITIVE_FOR_PRIVACY) == 0));
 
-        mWm.updateInputChannel(inputChannel.getToken(), null /* hostInputToken */,
-                DEFAULT_DISPLAY, surfaceControl,
+        mWm.updateInputChannel(inputChannel.getToken(), DEFAULT_DISPLAY, surfaceControl,
                 FLAG_NOT_FOCUSABLE, PRIVATE_FLAG_TRUSTED_OVERLAY,
                 INPUT_FEATURE_SENSITIVE_FOR_PRIVACY,
                 null /* region */);