Add different error codes for getUserMedia.

content/common/media/media_stream_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.
 
 // IPC messages for the media streaming.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "url/gurl.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 #define IPC_MESSAGE_START MediaStreamMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(content::MediaStreamType,
                           content::NUM_MEDIA_TYPES - 1)
 
 IPC_ENUM_TRAITS_MAX_VALUE(content::VideoFacingMode,
                           content::NUM_MEDIA_VIDEO_FACING_MODE - 1)
 
+IPC_ENUM_TRAITS_MAX_VALUE(content::MediaStreamRequestResult,
+                          content::NUM_MEDIA_REQUEST_RESULTS - 1)
+
 IPC_STRUCT_TRAITS_BEGIN(content::StreamOptions::Constraint)
   IPC_STRUCT_TRAITS_MEMBER(name)
   IPC_STRUCT_TRAITS_MEMBER(value)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::StreamOptions)
   IPC_STRUCT_TRAITS_MEMBER(audio_requested)
   IPC_STRUCT_TRAITS_MEMBER(mandatory_audio)
   IPC_STRUCT_TRAITS_MEMBER(optional_audio)
   IPC_STRUCT_TRAITS_MEMBER(video_requested)
@@ skipping 20 matching lines @@
 // Message sent from the browser to the renderer
 
 // The browser has generated a stream successfully.
 IPC_MESSAGE_ROUTED4(MediaStreamMsg_StreamGenerated,
                     int /* request id */,
                     std::string /* label */,
                     content::StreamDeviceInfoArray /* audio_device_list */,
                     content::StreamDeviceInfoArray /* video_device_list */)
 
 // The browser has failed to generate a stream.
-IPC_MESSAGE_ROUTED1(MediaStreamMsg_StreamGenerationFailed,
-                    int /* request id */)
+IPC_MESSAGE_ROUTED2(MediaStreamMsg_StreamGenerationFailed,
+                    int /* request id */,
+                    content::MediaStreamRequestResult /* result */)
 
 // The browser reports that a media device has been stopped. Stopping was
 // triggered from the browser process.
 IPC_MESSAGE_ROUTED2(MediaStreamMsg_DeviceStopped,
                     std::string /* label */,
                     content::StreamDeviceInfo /* the device */)
 
 // The browser has enumerated devices. If no devices are found
 // |device_list| is empty.
 // Used by Pepper.
@@ skipping 72 matching lines @@
                      int /* render view id */,
                      int /* request id */,
                      std::string /* device_id */,
                      content::MediaStreamType /* type */,
                      GURL /* security origin */)
 
 // Request to close a device.
 IPC_MESSAGE_CONTROL2(MediaStreamHostMsg_CloseDevice,
                      int /* render view id */,
                      std::string /*label*/)