ART: Refactor stack.h

Factor out LockCountData, ShadowFrame and JavaFrameRootInfo and leave
stack.h for the StackVisitor. Move single-use function to user to remove
DexFile dependency.

Test: m test-art-host
Change-Id: I53d2880917bdf6782856fd2b16f38a0293f3aefc
diff --git a/runtime/java_frame_root_info.h b/runtime/java_frame_root_info.h
new file mode 100644
index 0000000..25ac6e2
--- /dev/null
+++ b/runtime/java_frame_root_info.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_
+#define ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_
+
+#include <iosfwd>
+
+#include "base/macros.h"
+#include "base/mutex.h"
+#include "gc_root.h"
+
+namespace art {
+
+class StackVisitor;
+
+class JavaFrameRootInfo FINAL : public RootInfo {
+ public:
+  JavaFrameRootInfo(uint32_t thread_id, const StackVisitor* stack_visitor, size_t vreg)
+     : RootInfo(kRootJavaFrame, thread_id), stack_visitor_(stack_visitor), vreg_(vreg) {
+  }
+  void Describe(std::ostream& os) const OVERRIDE
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  size_t GetVReg() const {
+    return vreg_;
+  }
+  const StackVisitor* GetVisitor() const {
+    return stack_visitor_;
+  }
+
+ private:
+  const StackVisitor* const stack_visitor_;
+  const size_t vreg_;
+};
+
+}  // namespace art
+
+#endif  // ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_