Make channel preemption not require view contexts for hookup

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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/frame_host/render_widget_host_view_child_frame.h"
 
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/surfaces/surface_sequence.h"
@@ skipping 412 matching lines @@
 
 bool RenderWidgetHostViewChildFrame::CanCopyToVideoFrame() const {
   return false;
 }
 
 bool RenderWidgetHostViewChildFrame::HasAcceleratedSurface(
       const gfx::Size& desired_size) {
   return false;
 }
 
-gfx::GLSurfaceHandle RenderWidgetHostViewChildFrame::GetCompositingSurface() {
-  return gfx::GLSurfaceHandle(gfx::kNullPluginWindow, gfx::NULL_TRANSPORT);
-}
-
 #if defined(OS_WIN)
 void RenderWidgetHostViewChildFrame::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
 }
 
 gfx::NativeViewId RenderWidgetHostViewChildFrame::GetParentForWindowlessPlugin()
     const {
   return NULL;
 }
 #endif // defined(OS_WIN)
@@ skipping 24 matching lines @@
       BrowserAccessibilityManager::GetEmptyDocument(), delegate);
 }
 
 void RenderWidgetHostViewChildFrame::ClearCompositorSurfaceIfNecessary() {
   if (surface_factory_ && !surface_id_.is_null())
     surface_factory_->Destroy(surface_id_);
   surface_id_ = cc::SurfaceId();
 }
 
 }  // namespace content