Revert of Refactor content/common/gpu into gpu/ipc/service

gpu/command_buffer/service/valuebuffer_manager.h

 // Copyright (c) 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 GPU_COMMAND_BUFFER_SERVICE_VALUEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_VALUEBUFFER_MANAGER_H_
 
 #include <stdint.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "gpu/command_buffer/common/value_state.h"
 #include "gpu/gpu_export.h"
 
-namespace gpu {
+namespace content {
 class GpuChannel;
 }
 
 namespace gpu {
 namespace gles2 {
 
 class ValuebufferManager;
 
 class GPU_EXPORT SubscriptionRefSet
     : public base::RefCounted<SubscriptionRefSet> {
@@ skipping 127 matching lines @@
   // many value buffers are currently subscribed to each
   scoped_refptr<SubscriptionRefSet> subscription_ref_set_;
 
   DISALLOW_COPY_AND_ASSIGN(ValuebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_VALUEBUFFER_MANAGER_H_