Use a direct include of the shared_memory header in media/, ppapi/, webkit/.

ppapi/proxy/plugin_var_tracker.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 PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 #define PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
-#include "base/shared_memory.h"
+#include "base/memory/shared_memory.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/var_tracker.h"
 
 template<typename T> struct DefaultSingletonTraits;
 struct PPP_Class_Deprecated;
 
 namespace ppapi {
 
@@ skipping 171 matching lines @@
       UserDataToPluginImplementedVarMap;
   UserDataToPluginImplementedVarMap user_data_to_plugin_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginVarTracker);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_