Remove some usage of the ENABLE_GPU macro.

content/common/gpu/gpu_memory_tracking.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_TRACKING_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_TRACKING_H_
 
-#if defined(ENABLE_GPU)
-
 #include "base/basictypes.h"
 #include "base/process.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
 
 namespace content {
 
 class GpuMemoryManager;
 
 // All decoders in a context group point to a single GpuMemoryTrackingGroup,
@@ skipping 28 matching lines @@
   // Set and used only during the Manage function, to determine which
   // non-surface clients should be hibernated.
   bool hibernated_;
 
   gpu::gles2::MemoryTracker* memory_tracker_;
   GpuMemoryManager* memory_manager_;
 };
 
 }  // namespace content
 
-#endif
-
 #endif // CONTENT_COMMON_GPU_GPU_MEMORY_TRACKING_H_