Remove unused include in sequenced_worker_pool.h

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/memory/ref_counted.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 {
@@ skipping 73 matching lines @@
   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_