Fix UiThreadGpu initialization for video accelerator tests

ui/ozone/public/ui_thread_gpu.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 UI_OZONE_PUBLIC_UI_THREAD_GPU_H_
 #define UI_OZONE_PUBLIC_UI_THREAD_GPU_H_
 
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/ozone/ozone_export.h"
 
 namespace base {
+class SingleThreadTaskRunner;
 class Thread;
 }
 
 namespace ui {
 
 class FakeGpuProcess;
 class FakeGpuProcessHost;
 
 // Helper class for applications that do GL on the UI thead.
 //
 // This sets up message forwarding between the "gpu" and "ui" threads,
 // for applications in which they are both the same thread.
 class OZONE_EXPORT UiThreadGpu {
  public:
   UiThreadGpu();
   virtual ~UiThreadGpu();
 
   // Start processing gpu messages.
-  bool Initialize();
+  bool Initialize(
+      const scoped_refptr<base::SingleThreadTaskRunner>& browser_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& gpu_task_runner);
 
  private:
   scoped_ptr<FakeGpuProcess> fake_gpu_process_;
   scoped_ptr<FakeGpuProcessHost> fake_gpu_process_host_;
   scoped_ptr<base::Thread> io_helper_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(UiThreadGpu);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_UI_THREAD_GPU_H_