android: Add draw completion for CompositorView

chrome/browser/android/compositor/compositor_view.cc

 // Copyright 2015 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 "chrome/browser/android/compositor/compositor_view.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 
 #include <memory>
@@ skipping 109 matching lines @@
   JNIEnv* env = base::android::AttachCurrentThread();
   // TODO(wkorman): Rename JNI interface to onCompositorUpdateLayerTreeHost.
   Java_CompositorView_onCompositorLayout(env, obj_);
 }
 
 void CompositorView::DidSwapFrame(int pending_frames) {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_CompositorView_didSwapFrame(env, obj_, pending_frames);
 }
 
+void CompositorView::DidSwapBuffers() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_CompositorView_didSwapBuffers(env, obj_);
+}
+
 ui::UIResourceProvider* CompositorView::GetUIResourceProvider() {
   return compositor_ ? &compositor_->GetUIResourceProvider() : nullptr;
 }
 
 void CompositorView::SurfaceCreated(JNIEnv* env,
                                     const JavaParamRef<jobject>& object) {
   compositor_->SetRootLayer(root_layer_);
   current_surface_format_ = 0;
 }
 
@@ skipping 113 matching lines @@
   // The Android TERMINATION_STATUS_OOM_PROTECTED hack causes us to never go
   // through here but through BrowserChildProcessHostDisconnected() instead.
 }
 
 // Register native methods
 bool RegisterCompositorView(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android