[Android] Provide synchronized input flush with BeginFrame

content/browser/android/content_view_core_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 697 matching lines @@
 void ContentViewCoreImpl::RemoveLayer(scoped_refptr<cc::Layer> layer) {
   layer->RemoveFromParent();
 }
 
 void ContentViewCoreImpl::LoadUrl(
     NavigationController::LoadURLParams& params) {
   GetWebContents()->GetController().LoadURLWithParams(params);
   UpdateTabCrashedFlag();
 }
 
-void ContentViewCoreImpl::SetNeedsBeginFrame(bool enabled) {
+void ContentViewCoreImpl::AddBeginFrameSubscriber() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
-  Java_ContentViewCore_setVSyncNotificationEnabled(
-      env, obj.obj(), static_cast<jboolean>(enabled));
+  Java_ContentViewCore_addVSyncSubscriber(env, obj.obj());
+}
+
+void ContentViewCoreImpl::RemoveBeginFrameSubscriber() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_ContentViewCore_removeVSyncSubscriber(env, obj.obj());
 }
 
 void ContentViewCoreImpl::SetNeedsAnimate() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
   Java_ContentViewCore_setNeedsAnimate(env, obj.obj());
 }
 
@@ skipping 874 matching lines @@
       reinterpret_cast<ui::ViewAndroid*>(view_android),
       reinterpret_cast<ui::WindowAndroid*>(window_android));
   return reinterpret_cast<jint>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content