Add content::RenderWidgetHost::MouseEventCallback

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 2004c0b663c8f5e332a90f44c9839242a230ffde..293df1112ac8efe059cb648dfbe012ce3db3e8c0 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -175,6 +175,10 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   virtual void WasResized() OVERRIDE;
   virtual void AddKeyboardListener(KeyboardListener* listener) OVERRIDE;
   virtual void RemoveKeyboardListener(KeyboardListener* listener) OVERRIDE;
+  virtual void AddMouseEventCallback(
+      const MouseEventCallback& callback) OVERRIDE;
+  virtual void RemoveMouseEventCallback(
+      const MouseEventCallback& callback) OVERRIDE;
   virtual void GetWebScreenInfo(WebKit::WebScreenInfo* result) OVERRIDE;
   virtual void GetSnapshotFromRenderer(
       const gfx::Rect& src_subrect,
@@ -705,6 +709,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // widgets that don't have focus to still handle key presses.
   bool KeyPressListenersHandleEvent(const NativeWebKeyboardEvent& event);
 
+  // Give mouse event callbacks a chance to handle this mouse event.
+  bool MouseEventCallbacksHandleEvent(const WebKit::WebMouseEvent& event);
+
   // InputRouterClient
   virtual InputEventAckState FilterInputEvent(
       const WebKit::WebInputEvent& event,
@@ -824,6 +831,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // Keyboard event listeners.
   ObserverList<KeyboardListener> keyboard_listeners_;
 
+  // Mouse event callbacks.
+  std::vector<MouseEventCallback> mouse_event_callbacks_;
+
   // If true, then we should repaint when restoring even if we have a
   // backingstore.  This flag is set to true if we receive a paint message
   // while is_hidden_ to true.  Even though we tell the render widget to hide