Introduce shared_memory_support media target for PPAPI

ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h b/ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h
index e23cd9d51591bd25f096aac80f037512cc6ace62..600f0985d58a86d7f61c0c3301e7443e61b1cacc 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.h
@@ -81,14 +81,6 @@ 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_