Support audio output device enumeration and selection in PPAPI

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 <stdint.h>
 
 #include <map>
 #include <string>
@@ skipping 2232 matching lines @@
 IPC_MESSAGE_CONTROL3(PpapiHostMsg_AudioInput_Open,
                      std::string /* device_id */,
                      PP_AudioSampleRate /* sample_rate */,
                      uint32_t /* sample_frame_count */)
 // Reply to an Open call. This supplies a socket handle and a shared memory
 // handle. Both handles are passed in the ReplyParams struct.
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_AudioInput_OpenReply)
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_AudioInput_StartOrStop, bool /* capture */)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_AudioInput_Close)
 
+// Audio output.
+IPC_MESSAGE_CONTROL0(PpapiHostMsg_AudioOutput_Create)
+IPC_MESSAGE_CONTROL3(PpapiHostMsg_AudioOutput_Open,
+                     std::string /* device_id */,
+                     PP_AudioSampleRate /* sample_rate */,
+                     uint32_t /* sample_frame_count */)
+// Reply to an Open call. This supplies a socket handle and a shared memory
+// handle. Both handles are passed in the ReplyParams struct.
+IPC_MESSAGE_CONTROL0(PpapiPluginMsg_AudioOutput_OpenReply)
+IPC_MESSAGE_CONTROL1(PpapiHostMsg_AudioOutput_StartOrStop, bool /* playback */)
+IPC_MESSAGE_CONTROL0(PpapiHostMsg_AudioOutput_Close)
+
 // BrowserFont -----------------------------------------------------------------
 
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_BrowserFontSingleton_Create)
 
 // Requests that the browser reply with the list of font families via
 // PpapiPluginMsg_BrowserFontSingleton_GetFontFamiliesReply.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_BrowserFontSingleton_GetFontFamilies)
 
 // Reply to PpapiHostMsg_BrowserFontSingleton_GetFontFamilies with the font
 // family list. The |families| result is encoded by separating each family name
@@ skipping 267 matching lines @@
                      uint32_t /* status */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_VideoCapture_OnError,
                      uint32_t /* error */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_VideoCapture_OnBufferReady,
                      uint32_t /* buffer */)
 
 // Sent by the PPAPI process to indicate that a field trial has been activated.
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_FieldTrialActivated, std::string /* name */)
 
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)