Inject GPUDataManager support into ash to abstract a content dependency.

ash/content_support/gpu_support_impl.h

Index: ash/content_support/gpu_support_impl.h
diff --git a/ash/content_support/gpu_support_impl.h b/ash/content_support/gpu_support_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..ee82d06d38c24f72cbfa8b421d131cdb89570bb4
--- /dev/null
+++ b/ash/content_support/gpu_support_impl.h
@@ -0,0 +1,29 @@
+// 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_CONTENT_SUPPORT_GPU_SUPPORT_IMPL_H_
+#define ASH_CONTENT_SUPPORT_GPU_SUPPORT_IMPL_H_
+
+#include "ash/gpu_support.h"
+
+namespace ash {
+
+class GPUSupportImpl : public GPUSupport {
+ public:
+  GPUSupportImpl();
+  virtual ~GPUSupportImpl();
+
+ 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(GPUSupportImpl);
+};
+
+}  // namespace ash
+
+#endif  // ASH_CONTENT_SUPPORT_GPU_SUPPORT_IMPL_H_