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 8a50861266f4515e02637d3bd0800f0e8a3a114a..98740c70b5b928cbd6c30775a92b64caac120b24 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -43,6 +43,7 @@ class WebMouseEvent;
 
 namespace content {
 class ContentViewCoreImpl;
+class OverscrollGlow;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class SurfaceTextureTransportClient;
@@ -152,6 +153,9 @@ class RenderWidgetHostViewAndroid
   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;
   virtual SmoothScrollGesture* CreateSmoothScrollGesture(
@@ -198,6 +202,8 @@ class RenderWidgetHostViewAndroid
   void RequestContentClipping(const gfx::Rect& clipping,
                               const gfx::Size& content_size);
 
+  void Animate(base::TimeTicks frame_time);
+
  private:
   void BuffersSwapped(const gpu::Mailbox& mailbox,
                       const base::Closure& ack_callback);
@@ -211,6 +217,12 @@ class RenderWidgetHostViewAndroid
   void ResetClipping();
   void ClipContents(const gfx::Rect& clipping, const gfx::Size& content_size);
 
+  void AttachLayers();
+  void RemoveLayers();
+
+  void UpdateAnimationSize(const cc::CompositorFrame* frame);
+  void ScheduleAnimationIfNecessary();
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
@@ -218,7 +230,7 @@ class RenderWidgetHostViewAndroid
   // 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_;
@@ -260,6 +272,9 @@ class RenderWidgetHostViewAndroid
 
   std::queue<base::Closure> ack_callbacks_;
 
+  // Used to render overscroll overlays

[Sami, 2013/05/10 10:47:57]

Nit: end comments with a period.

[jdduke (slow), 2013/05/10 16:39:52]

Done.

+  scoped_ptr<OverscrollGlow> overscroll_effect_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };