Introduce shared_memory_support media target for PPAPI

ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_GLOBALS_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_GLOBALS_H_
 
 #include "ppapi/c/dev/ppb_memory_dev.h"
 #include "ppapi/c/dev/ppp_find_dev.h"
 #include "ppapi/c/dev/ppp_printing_dev.h"
@@ skipping 63 matching lines @@
 const PPP_Selection_Dev* PPPSelectionInterface();
 const PPP_Widget_Dev* PPPWidgetInterface();
 const PPP_Zoom_Dev* PPPZoomInterface();
 
 // Get thread creation/join functions.
 const struct PP_ThreadFunctions* GetThreadCreator();
 
 // PPAPI constants used in the proxy.
 extern const PP_Resource kInvalidResourceId;
 
-// The following function TotalSharedMemorySizeInBytes, is copied & similar
-// to the one in audio_util.cc.  This function includes optional fields
-// stored at the end of the audio buffer.
-inline size_t TotalAudioSharedMemorySizeInBytes(size_t audio_buffer_size) {
-  // Include optional field that communicates the number of bytes written.
-  return audio_buffer_size + sizeof(uint32_t);
-}
-
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_GLOBALS_H_