Implement ConstraintNotSatisfiedError for getusermedia

content/renderer/media/media_stream_video_capturer_source.cc

 // Copyright 2014 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.
 
 #include "content/renderer/media/media_stream_video_capturer_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
@@ skipping 119 matching lines @@
   }
   running_callback_.Reset();
   source_formats_callback_.Reset();
 }
 
 void VideoCapturerDelegate::OnStateUpdateOnRenderThread(
     VideoCaptureState state) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DVLOG(3) << "OnStateUpdateOnRenderThread state = " << state;
   if (state == VIDEO_CAPTURE_STATE_STARTED && !running_callback_.is_null()) {
-    running_callback_.Run(true);
+    running_callback_.Run(MEDIA_DEVICE_OK);
     return;
   }
   if (state > VIDEO_CAPTURE_STATE_STARTED && !running_callback_.is_null()) {
-    base::ResetAndReturn(&running_callback_).Run(false);
+    base::ResetAndReturn(&running_callback_).Run(
+        MEDIA_DEVICE_TRACK_START_FAILURE);

[no longer working on chromium, 2014/07/25 19:27:35]

why isn't it MEDIA_DEVICE_SOURCE_START_FAILURE ?

   }
 }
 
 void VideoCapturerDelegate::OnDeviceFormatsInUseReceived(
     const media::VideoCaptureFormats& formats_in_use) {
   DVLOG(3) << "OnDeviceFormatsInUseReceived: " << formats_in_use.size();
   DCHECK(thread_checker_.CalledOnValidThread());
   // StopCapture() might have destroyed |source_formats_callback_| before
   // arriving here.
   if (source_formats_callback_.is_null())
@@ skipping 83 matching lines @@
       frame_callback,
       base::Bind(&MediaStreamVideoCapturerSource::OnStartDone,
                  base::Unretained(this)));
 }
 
 void MediaStreamVideoCapturerSource::StopSourceImpl() {
   delegate_->StopCapture();
 }
 
 }  // namespace content