mac: History swiping doesn't work right with iframes.

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 40 matching lines @@
                                 size_t offset,
                                 const gfx::Range& range) OVERRIDE;
   virtual void SetBackground(const SkBitmap& background) OVERRIDE;
   virtual const SkBitmap& GetBackground() OVERRIDE;
   virtual gfx::Size GetPhysicalBackingSize() const OVERRIDE;
   virtual float GetOverdrawBottomHeight() const OVERRIDE;
   virtual bool IsShowingContextMenu() const OVERRIDE;
   virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
   virtual base::string16 GetSelectedText() const OVERRIDE;
   virtual bool IsMouseLocked() OVERRIDE;
-  virtual void UnhandledWheelEvent(
-      const blink::WebMouseWheelEvent& event) OVERRIDE;
+  virtual void HandledWheelEvent(const blink::WebMouseWheelEvent& event,
+                                 bool consumed) OVERRIDE;
   virtual InputEventAckState FilterInputEvent(
       const blink::WebInputEvent& input_event) OVERRIDE;
   virtual void OnSetNeedsFlushInput() OVERRIDE;
   virtual void OnDidFlushInput() OVERRIDE;
   virtual void GestureEventAck(const blink::WebGestureEvent& event,
                                InputEventAckState ack_result) OVERRIDE;
   virtual void SetPopupType(blink::WebPopupType popup_type) OVERRIDE;
   virtual blink::WebPopupType GetPopupType() OVERRIDE;
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const OVERRIDE;
@@ skipping 102 matching lines @@
   uint32 renderer_frame_number_;
 
   base::OneShotTimer<RenderWidgetHostViewBase> flush_input_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_