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

ppapi/proxy/serialized_handle.cc

 // Copyright (c) 2013 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.
 
 #include "ppapi/proxy/serialized_handle.h"
 
+#include "base/memory/shared_memory.h"
 #include "base/pickle.h"
 #include "base/platform_file.h"
-#include "base/shared_memory.h"
 #include "build/build_config.h"
 #include "ipc/ipc_platform_file.h"
 
 #if defined(OS_NACL)
 #include <unistd.h>
 #endif
 
 namespace ppapi {
 namespace proxy {
 
@@ skipping 114 matching lines @@
       break;
     // No default so the compiler will warn us if a new type is added.
   }
   if (valid_type)
     hdr->type = Type(type);
   return valid_type;
 }
 
 }  // namespace proxy
 }  // namespace ppapi