[cc] Enable specifying a overhang/gutter texture.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 418 matching lines @@
 }
 
 void RenderWidgetCompositor::setBackgroundColor(WebKit::WebColor color) {
   layer_tree_host_->set_background_color(color);
 }
 
 void RenderWidgetCompositor::setHasTransparentBackground(bool transparent) {
   layer_tree_host_->set_has_transparent_background(transparent);
 }
 
+void RenderWidgetCompositor::setOverhangBitmap(SkBitmap bitmap) {
+  layer_tree_host_->SetOverhangBitmap(bitmap);
+}
+
 void RenderWidgetCompositor::setVisible(bool visible) {
   layer_tree_host_->SetVisible(visible);
 }
 
 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
     float page_scale_factor, float minimum, float maximum) {
   layer_tree_host_->SetPageScaleFactorAndLimits(
       page_scale_factor, minimum, maximum);
 }
 
@@ skipping 141 matching lines @@
   return RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   return RenderThreadImpl::current()->
       OffscreenContextProviderForCompositorThread();
 }
 
 }  // namespace content