Fix CHA test failures under some configurations.

Some checks in IsManaged() are outdated.

Bug: 36344221
Test: m -j20 test-art-host-run-test
Test: test-art-host-run-test-debug-no-dex2oat-jit-no-relocate-ntrace-cms-checkjni-picimage-npictest-ndebuggable-616-cha-abstract64
Change-Id: Iec248cddf08b0a4ebce5f8fbca75d8d280797640
diff --git a/test/common/stack_inspect.cc b/test/common/stack_inspect.cc
index df7fa20..ceb4ba2 100644
--- a/test/common/stack_inspect.cc
+++ b/test/common/stack_inspect.cc
@@ -144,22 +144,11 @@
   }
 }
 
-static jboolean IsManaged(JNIEnv* env, jclass cls, size_t level) {
+static jboolean IsManaged(JNIEnv* env, jclass, size_t level) {
   ScopedObjectAccess soa(env);
-
-  ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls);
-  const DexFile& dex_file = klass->GetDexFile();
-  const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
-  if (oat_dex_file == nullptr) {
-    // No oat file, this must be a test configuration that doesn't compile at all. Ignore that the
-    // result will be that we're running the interpreter.
-    return JNI_FALSE;
-  }
-
   NthCallerVisitor caller(soa.Self(), level, false);
   caller.WalkStack();
   CHECK(caller.caller != nullptr);
-
   return caller.GetCurrentShadowFrame() != nullptr ? JNI_FALSE : JNI_TRUE;
 }
 
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 7891d4c..9f5c809 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -220,7 +220,6 @@
         "tests": ["604-hot-static-interface",
                   "612-jit-dex-cache",
                   "613-inlining-dex-cache",
-                  "616-cha",
                   "626-set-resolved-string"],
         "variant": "trace  | stream",
         "description": ["These tests expect JIT compilation, which is",
@@ -330,14 +329,8 @@
         "variant": "interpreter | optimizing | regalloc_gc | jit"
     },
     {
-        "tests": ["912-classes",
-                  "616-cha",
-                  "616-cha-abstract",
-                  "616-cha-interface",
-                  "616-cha-interface-default",
-                  "616-cha-miranda",
-                  "616-cha-proxy-method-inline"],
-        "bug": "http://b/36344364 http://b/36344221",
+        "tests": ["912-classes"],
+        "bug": "http://b/36344364",
         "variant": "no-dex2oat | relocate-npatchoat"
     },
     {