Add different error codes for getUserMedia.

content/public/common/media_stream_request.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.
 
 #ifndef CONTENT_PUBLIC_COMMON_MEDIA_STREAM_REQUEST_H_
 #define CONTENT_PUBLIC_COMMON_MEDIA_STREAM_REQUEST_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 41 matching lines @@
 enum VideoFacingMode {
   MEDIA_VIDEO_FACING_NONE = 0,
   MEDIA_VIDEO_FACING_USER,
   MEDIA_VIDEO_FACING_ENVIRONMENT,
   MEDIA_VIDEO_FACING_LEFT,
   MEDIA_VIDEO_FACING_RIGHT,
 
   NUM_MEDIA_VIDEO_FACING_MODE
 };
 
+enum MediaStreamRequestResult {
+  MEDIA_DEVICE_OK = 0,
+  MEDIA_DEVICE_PERMISSION_DENIED,
+  MEDIA_DEVICE_PERMISSION_DISMISSED,
+  MEDIA_DEVICE_INVALID_STATE,
+  MEDIA_DEVICE_NO_HARDWARE,
+  MEDIA_DEVICE_INVALID_SECURITY_ORIGIN,
+  MEDIA_DEVICE_TAB_CAPTURE_FAILURE,
+  MEDIA_DEVICE_SCREEN_CAPTURE_FAILURE,
+  MEDIA_DEVICE_CAPTURE_FAILURE,
+  MEDIA_DEVICE_TRACK_START_FAILURE,
+
+  NUM_MEDIA_REQUEST_RESULTS
+};
+
 // Convenience predicates to determine whether the given type represents some
 // audio or some video device.
 CONTENT_EXPORT bool IsAudioMediaType(MediaStreamType type);
 CONTENT_EXPORT bool IsVideoMediaType(MediaStreamType type);
 
 // TODO(xians): Change the structs to classes.
 // Represents one device in a request for media stream(s).
 struct CONTENT_EXPORT MediaStreamDevice {
   MediaStreamDevice();
 
@@ skipping 146 matching lines @@
   virtual ~MediaStreamUI() {}
 
   // Called when MediaStream capturing is started. Chrome layer can call |stop|
   // to stop the stream.
   virtual void OnStarted(const base::Closure& stop) = 0;
 };
 
 // Callback used return results of media access requests.
 typedef base::Callback<void(
     const MediaStreamDevices& devices,
+    content::MediaStreamRequestResult result,
     scoped_ptr<MediaStreamUI> ui)> MediaResponseCallback;
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_MEDIA_STREAM_REQUEST_H_