VideoCapture messages: remove unused VIDEO_CAPTURE_STATE_STARTING

BUG=651897

Review-Url: https://codereview.chromium.org/2386153004
Cr-Commit-Position: refs/heads/master@{#422685}

content/common/media/video_capture.h

@@ -23,7 +23,6 @@ using VideoCaptureDeliverFrameCB =
 // browser process and renderer process. Browser process sends information about
 // the current capture state and error to the renderer process using this type.
 enum VideoCaptureState {
-  VIDEO_CAPTURE_STATE_STARTING,
   VIDEO_CAPTURE_STATE_STARTED,
   VIDEO_CAPTURE_STATE_PAUSED,
   VIDEO_CAPTURE_STATE_RESUMED,

content/renderer/media/media_stream_video_capturer_source.cc

@@ -365,7 +365,6 @@ void LocalVideoCapturerSource::OnStateUpdate(VideoCaptureState state) {
       base::ResetAndReturn(&running_callback_).Run(false);
       break;
 
-    case VIDEO_CAPTURE_STATE_STARTING:
     case VIDEO_CAPTURE_STATE_PAUSED:
     case VIDEO_CAPTURE_STATE_RESUMED:
       // Not applicable to reporting on device start success/failure.