[PPAPI] Pepper MediaStream API audio track implementation and example.

ppapi/proxy/ppapi_messages.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.
 
 // Multiply-included message header, no traditional include guard.
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 1395 matching lines @@
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Graphics2D_ReadImageDataAck)
 
 // IsolatedFileSystem
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_IsolatedFileSystem_Create)
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_IsolatedFileSystem_BrowserOpen,
                      PP_IsolatedFileSystemType_Private /* type */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply,
                      std::string /* fsid */)
 
 // MediaStream -----------------------------------------------------------------
-// Message for init frames. It also takes a shared memory handle.
+IPC_MESSAGE_CONTROL1(PpapiPluginMsg_MediaStreamAudioTrack_CreateFromPendingHost,
+                     std::string /* track_id */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_MediaStreamVideoTrack_CreateFromPendingHost,
                      std::string /* track_id */)
+
+// Message for init frames. It also takes a shared memory handle.
 IPC_MESSAGE_CONTROL2(PpapiPluginMsg_MediaStreamTrack_InitFrames,
                      int32_t /* number_of_frames */,
                      int32_t /* frame_size */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_MediaStreamTrack_EnqueueFrame,
                      int32_t /* index */);
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_MediaStreamTrack_EnqueueFrame,
                      int32_t /* index */);
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_MediaStreamTrack_Close)
 
 // NetworkMonitor.
@@ skipping 600 matching lines @@
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_Talk_RequestPermission,
                      PP_TalkPermission /* permission */)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_RequestPermissionReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StartRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StartRemotingReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StopRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StopRemotingReply)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_Talk_NotifyEvent, PP_TalkEvent /* event */)
 
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)