Remove the ENABLE_GPU #define and enable_gpu gyp variable

content/common/gpu/gpu_memory_manager_client.h

 // Copyright (c) 2012 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 CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
 
-#if defined(ENABLE_GPU)
-
 #include <list>
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
@@ skipping 81 matching lines @@
   uint64 bytes_allocation_ideal_required_;
   uint64 bytes_allocation_ideal_minimum_;
 
   // Set to disable allocating a frontbuffer or to disable allocations
   // for clients that don't have surfaces.
   bool hibernated_;
 };
 
 }  // namespace content
 
-#endif
-
 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_