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

content/browser/renderer_host/render_widget_host_impl_android.cc

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/common/view_messages.h"
 #include "content/port/browser/render_widget_host_view_port.h"
 #include "ui/gfx/vector2d_f.h"
 
 namespace content {
 
 void RenderWidgetHostImpl::OnUpdateFrameInfo(
-    const gfx::Vector2d& scroll_offset,
-    float page_scale_factor,
-    float min_page_scale_factor,
-    float max_page_scale_factor,
-    const gfx::Size& content_size) {
+    const ViewHostMsg_UpdateFrameInfo_Params& params) {
   if (view_)
-    view_->UpdateFrameInfo(scroll_offset,
-                           page_scale_factor,
-                           min_page_scale_factor,
-                           max_page_scale_factor,
-                           content_size,
+    view_->UpdateFrameInfo(params.scroll_offset,
+                           params.unused_scroll_delta,
+                           params.page_scale_factor,
+                           params.min_page_scale_factor,
+                           params.max_page_scale_factor,
+                           params.content_size,
                            gfx::Vector2dF(),
                            gfx::Vector2dF());
 }
 
 }  // namespace content