Add overscroll edge effect animations for Android.

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 0a04ba119f1728687c4a996286777e6b91b74f15..8bbc8b0184e7f9e2bb65f598a3679c110b6c9713 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -40,6 +40,7 @@ class WebMouseEvent;
 
 namespace content {
 class ContentViewCoreImpl;
+class OverscrollGlow;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class SurfaceTextureTransportClient;
@@ -147,6 +148,9 @@ class RenderWidgetHostViewAndroid : public RenderWidgetHostViewBase,
   virtual void HasTouchEventHandlers(bool need_touch_events) OVERRIDE;
   virtual void OnSwapCompositorFrame(
       scoped_ptr<cc::CompositorFrame> frame) OVERRIDE;
+  virtual void OnOverscrolled(const gfx::Vector2dF& accumulated_overscroll,
+                              const gfx::Vector2dF& current_fling_velocity)
+                                  OVERRIDE;
   virtual void ShowDisambiguationPopup(const gfx::Rect& target_rect,
                                        const SkBitmap& zoomed_bitmap) OVERRIDE;
 
@@ -192,6 +196,14 @@ class RenderWidgetHostViewAndroid : public RenderWidgetHostViewBase,
 
   void RunAckCallbacks();
 
+  void RequestVSyncNotificationsIfNecessary();
+
+  void AttachLayers();
+  void RemoveLayers();
+
+  void Animate();
+  void ScheduleAnimation();
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
@@ -199,7 +211,7 @@ class RenderWidgetHostViewAndroid : public RenderWidgetHostViewBase,
   // This view may not actually be attached if this is true, but it should be
   // treated as such, because as soon as a ContentViewCore is set the layer
   // will be attached automatically.
-  bool is_layer_attached_;
+  bool are_layers_attached_;
 
   // ContentViewCoreImpl is our interface to the view system.
   ContentViewCoreImpl* content_view_core_;
@@ -236,6 +248,13 @@ class RenderWidgetHostViewAndroid : public RenderWidgetHostViewBase,
 
   std::queue<base::Closure> ack_callbacks_;
 
+  bool vsync_notifications_enabled_;
+  bool animation_vsync_notifications_enabled_;
+  bool renderer_vsync_notifications_enabled_;
+
+  // Used to render overscroll overlays
+  scoped_ptr<OverscrollGlow> overscroll_effect_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };