Provide TaskRunner to ContextCacheController

services/ui/surfaces/surfaces_context_provider.h

 // 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.
 
 #ifndef SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 #define SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/output/context_provider.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_surface.h"
 
+namespace base {
+class SingleThreadTaskRunner;
+}
+
 namespace gpu {
 
 class CommandBufferProxyImpl;
 struct GpuProcessHostedCALayerTreeParamsMac;
 class TransferBuffer;
 
 namespace gles2 {
 class GLES2CmdHelper;
 class GLES2Implementation;
 }
@@ skipping 53 matching lines @@
   std::unique_ptr<gpu::gles2::GLES2Implementation> implementation_;
   std::unique_ptr<cc::ContextCacheController> cache_controller_;
 
   gpu::Capabilities capabilities_;
   LostContextCallback lost_context_callback_;
 
   SurfacesContextProviderDelegate* delegate_;
   gfx::AcceleratedWidget widget_;
   std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_proxy_impl_;
   gl::GLSurface::SwapCompletionCallback swap_buffers_completion_callback_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesContextProvider);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_