Add overscroll edge effect animations for Android.

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index f666c143622138af704db0c2293629ca4a0bacd1..0a7508e21aa2bf6cf9d7ac900932e62eaeca2f66 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -197,6 +197,7 @@ class ContentViewCoreImpl : public ContentViewCore,
   void UpdateVSyncParameters(JNIEnv* env, jobject obj, jlong timebase_micros,
                              jlong interval_micros);
   void OnVSync(JNIEnv* env, jobject /* obj */, jlong frame_time_micros);
+  void Animate(JNIEnv* env, jobject /* obj */, jlong frame_time_micros);
   jboolean PopulateBitmapFromCompositor(JNIEnv* env,
                                         jobject obj,
                                         jobject jbitmap);
@@ -294,6 +295,7 @@ class ContentViewCoreImpl : public ContentViewCore,
   void AttachLayer(scoped_refptr<cc::Layer> layer);
   void RemoveLayer(scoped_refptr<cc::Layer> layer);
   void SetVSyncNotificationEnabled(bool enabled);
+  void SetNeedsAnimate();
 
  private:
   enum InputEventVSyncStatus {