Plumb an overscroll callback form the compositor to the Android UI thread.

content/browser/renderer_host/render_widget_host_view_guest.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_GUEST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 138 matching lines @@
   // RenderWidgetHostView implementation.
   virtual void StartContentIntent(const GURL& content_url) OVERRIDE;
   virtual void SetCachedBackgroundColor(SkColor color) OVERRIDE;
 
   // RenderWidgetHostViewPort implementation.
   virtual void ShowDisambiguationPopup(const gfx::Rect& target_rect,
                                        const SkBitmap& zoomed_bitmap) OVERRIDE;
   virtual void SetCachedPageScaleFactorLimits(float minimum_scale,
                                               float maximum_scale) OVERRIDE;
   virtual void UpdateFrameInfo(const gfx::Vector2d& scroll_offset,
+                               const gfx::Vector2d& unused_scroll_delta,
                                float page_scale_factor,
                                float min_page_scale_factor,
                                float max_page_scale_factor,
                                const gfx::Size& content_size,
                                const gfx::Vector2dF& controls_offset,
                                const gfx::Vector2dF& content_offset) OVERRIDE;
   virtual void HasTouchEventHandlers(bool need_touch_events) OVERRIDE;
 #endif  // defined(OS_ANDROID)
 
 #if defined(TOOLKIT_GTK)
@@ skipping 22 matching lines @@
 
   BrowserPluginGuest *guest_;
   gfx::Size size_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewGuest);
 };
 
 }  // namespace content
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_