Fix layering violation in content\browser\renderer_host. That directory shouldn't be including web_…

content/public/browser/gpu_data_manager.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_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 
 #include <list>
 #include <string>
 
+#include "base/callback_forward.h"
 #include "base/process.h"
 #include "content/common/content_export.h"
 #include "content/public/common/gpu_feature_type.h"
 #include "content/public/common/gpu_switching_option.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 class ListValue;
@@ skipping 74 matching lines @@
                             std::string* gl_renderer,
                             std::string* gl_version) = 0;
 
  protected:
   virtual ~GpuDataManager() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_