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

ppapi/proxy/serialized_structs.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_SERIALIZED_STRUCTS_H_
 #define PPAPI_PROXY_SERIALIZED_STRUCTS_H_
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
-#include "base/shared_memory.h"
+#include "base/memory/shared_memory.h"
 #include "build/build_config.h"
 #include "ppapi/c/dev/ppb_truetype_font_dev.h"
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/host_resource.h"
 
 class Pickle;
@@ skipping 101 matching lines @@
 // On legacy X Windows this is a SysV shared memory key.
 typedef int ImageHandle;
 #else
 typedef base::SharedMemoryHandle ImageHandle;
 #endif
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_SERIALIZED_STRUCTS_H_