Provide real GPUSupport to ash for Chrome

ash/gpu_support_stub.h

Index: ash/gpu_support_stub.h
diff --git a/ash/gpu_support_stub.h b/ash/gpu_support_stub.h
new file mode 100644
index 0000000000000000000000000000000000000000..b1be11d1cd53a04e699be3fe3286de8fc7842d2e
--- /dev/null
+++ b/ash/gpu_support_stub.h
@@ -0,0 +1,32 @@
+// 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 ASH_GPU_SUPPORT_STUB_H_
+#define ASH_GPU_SUPPORT_STUB_H_
+
+#include "ash/ash_export.h"
+#include "ash/gpu_support.h"
+#include "base/compiler_specific.h"
+
+namespace ash {
+
+// A GPUSupport object that does not depend on src/content.
+class ASH_EXPORT GPUSupportStub : public GPUSupport {
+ public:
+  GPUSupportStub();
+  virtual ~GPUSupportStub();
+
+ private:
+  // Overridden from GPUSupport:
+  virtual bool IsPanelFittingDisabled() const OVERRIDE;
+  virtual void DisableGpuWatchdog() OVERRIDE;
+  virtual void GetGpuProcessHandles(
+      const GetGpuProcessHandlesCallback& callback) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(GPUSupportStub);
+};
+
+}  // namespace ash
+
+#endif  // ASH_GPU_SUPPORT_STUB_H_