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

media/base/bitstream_buffer.h

 // Copyright (c) 2011 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 MEDIA_BASE_BITSTREAM_BUFFER_H_
 #define MEDIA_BASE_BITSTREAM_BUFFER_H_
 
 #include "base/basictypes.h"
-#include "base/shared_memory.h"
+#include "base/memory/shared_memory.h"
 
 namespace media {
 
 // Class for passing bitstream buffers around.  Does not take ownership of the
 // data.  This is the media-namespace equivalent of PP_VideoBitstreamBuffer_Dev.
 class BitstreamBuffer {
  public:
   BitstreamBuffer(int32 id, base::SharedMemoryHandle handle, size_t size)
       : id_(id),
         handle_(handle),
         size_(size) {
   }
 
   int32 id() const { return id_; }
   base::SharedMemoryHandle handle() const { return handle_; }
   size_t size() const { return size_; }
 
  private:
   int32 id_;
   base::SharedMemoryHandle handle_;
   size_t size_;
 
   // Allow compiler-generated copy & assign constructors.
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_BITSTREAM_BUFFER_H_