Android: Decouple animate from vsync

ui/base/android/window_android.cc

Index: ui/base/android/window_android.cc
diff --git a/ui/base/android/window_android.cc b/ui/base/android/window_android.cc
index 3dd3e6e2a6b3af44d7d00b265b24c7730dbc6f61..66eb1a65648eaec6d4aada4e0ac3db502cb14777 100644
--- a/ui/base/android/window_android.cc
+++ b/ui/base/android/window_android.cc
@@ -95,6 +95,16 @@ void WindowAndroid::RequestVSyncUpdate() {
   Java_WindowAndroid_requestVSyncUpdate(env, GetJavaObject().obj());
 }
 
+void WindowAndroid::SetNeedsAnimate() {
+  if (compositor_)
+    compositor_->SetNeedsAnimate();
+}
+
+void WindowAndroid::Animate(base::TimeTicks frame_begin_time) {
+  FOR_EACH_OBSERVER(
+      WindowAndroidObserver, observer_list_, OnAnimate(frame_begin_time));
+}
+
 void WindowAndroid::OnVSync(JNIEnv* env, jobject obj, jlong time_micros) {
   base::TimeTicks frame_time(base::TimeTicks::FromInternalValue(time_micros));
   FOR_EACH_OBSERVER(