Make it possible for the scroll offset delegate to intercept fling.

content/browser/renderer_host/render_widget_host_view_base.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #endif
@@ skipping 43 matching lines @@
   virtual gfx::Size GetPhysicalBackingSize() const OVERRIDE;
   virtual float GetOverdrawBottomHeight() const OVERRIDE;
   virtual bool IsShowingContextMenu() const OVERRIDE;
   virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
   virtual string16 GetSelectedText() const OVERRIDE;
   virtual bool IsMouseLocked() OVERRIDE;
   virtual void UnhandledWheelEvent(
       const WebKit::WebMouseWheelEvent& event) OVERRIDE;
   virtual InputEventAckState FilterInputEvent(
       const WebKit::WebInputEvent& input_event) OVERRIDE;
-  virtual void GestureEventAck(int gesture_event_type) OVERRIDE;
+  virtual void GestureEventAck(int gesture_event_type,
+                               InputEventAckState ack_result) OVERRIDE;
   virtual void SetPopupType(WebKit::WebPopupType popup_type) OVERRIDE;
   virtual WebKit::WebPopupType GetPopupType() OVERRIDE;
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const OVERRIDE;
   virtual void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
                                       InputEventAckState ack_result) OVERRIDE;
   virtual SmoothScrollGesture* CreateSmoothScrollGesture(
       bool scroll_down, int pixels_to_scroll, int mouse_event_x,
       int mouse_event_y) OVERRIDE;
   virtual bool CanSubscribeFrame() const OVERRIDE;
@@ skipping 81 matching lines @@
   gfx::Rect current_display_area_;
 
   uint32 renderer_frame_number_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_