Add GetSurfaceManager to ui::ContextFactory.

ui/compositor/test/in_process_context_factory.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 "ui/compositor/test/in_process_context_factory.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 234 matching lines @@
 
 std::unique_ptr<cc::SurfaceIdAllocator>
 InProcessContextFactory::CreateSurfaceIdAllocator() {
   std::unique_ptr<cc::SurfaceIdAllocator> allocator(
       new cc::SurfaceIdAllocator(next_surface_id_namespace_++));
   if (surface_manager_)
     allocator->RegisterSurfaceIdNamespace(surface_manager_);
   return allocator;
 }
 
+cc::SurfaceManager* InProcessContextFactory::GetSurfaceManager() {
+  return surface_manager_;
+}
+
 void InProcessContextFactory::ResizeDisplay(ui::Compositor* compositor,
                                             const gfx::Size& size) {
   if (!per_compositor_data_.count(compositor))
     return;
   per_compositor_data_[compositor]->display()->Resize(size);
 }
 
 }  // namespace ui