Introduce PPB_AudioInput_Dev v0.3 and refactor the device enumeration code:

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 <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 1664 matching lines @@
 IPC_MESSAGE_CONTROL4(PpapiPluginMsg_WebSocket_ClosedReply,
                      unsigned long /* buffered_amount */,
                      bool /* was_clean */,
                      unsigned short /* code */,
                      std::string /* reason */)
 
 #if !defined(OS_NACL) && !defined(NACL_WIN64)
 
 // Audio input.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_AudioInput_Create)
-IPC_MESSAGE_CONTROL0(PpapiHostMsg_AudioInput_EnumerateDevices)
-IPC_MESSAGE_CONTROL1(PpapiPluginMsg_AudioInput_EnumerateDevicesReply,
-                     std::vector<ppapi::DeviceRefData> /* devices */)
 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)
 
+// Device enumeration messages used by audio input and video capture.
+IPC_MESSAGE_CONTROL0(PpapiHostMsg_DeviceEnumeration_EnumerateDevices)
+IPC_MESSAGE_CONTROL1(PpapiPluginMsg_DeviceEnumeration_EnumerateDevicesReply,
+                     std::vector<ppapi::DeviceRefData> /* devices */)
+IPC_MESSAGE_CONTROL1(PpapiHostMsg_DeviceEnumeration_MonitorDeviceChange,
+                     uint32_t /* callback_id */)
+IPC_MESSAGE_CONTROL0(PpapiHostMsg_DeviceEnumeration_StopMonitoringDeviceChange)
+IPC_MESSAGE_CONTROL2(PpapiPluginMsg_DeviceEnumeration_NotifyDeviceChange,
+                     uint32_t /* callback_id */,
+                     std::vector<ppapi::DeviceRefData> /* devices */)
+
 // Flash clipboard.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_FlashClipboard_Create)
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_FlashClipboard_RegisterCustomFormat,
                      std::string /* format_name */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_FlashClipboard_RegisterCustomFormatReply,
                      uint32_t /* format */)
 IPC_MESSAGE_CONTROL2(PpapiHostMsg_FlashClipboard_IsFormatAvailable,
                      uint32_t /* clipboard_type */,
                      uint32_t /* format */)
 IPC_MESSAGE_CONTROL2(PpapiHostMsg_FlashClipboard_ReadData,
@@ skipping 15 matching lines @@
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_FlashFontFile_GetFontTableReply,
                      std::string /* output */)
 
 // Flash functions.
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Flash_Create)
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_Flash_EnumerateVideoCaptureDevices,
                      ppapi::HostResource /* video_capture */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_Flash_EnumerateVideoCaptureDevicesReply,
                      std::vector<ppapi::DeviceRefData> /* devices */)
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)