getUserMedia: handle the device starting status report.

content/browser/renderer_host/media/video_capture_controller.cc

Index: content/browser/renderer_host/media/video_capture_controller.cc
diff --git a/content/browser/renderer_host/media/video_capture_controller.cc b/content/browser/renderer_host/media/video_capture_controller.cc
index ec20aa05f04d15f662c7042b303989a8dfc64d4c..5ace2a4f89386286ceffe6ef760fd7987ce9f612 100644
--- a/content/browser/renderer_host/media/video_capture_controller.cc
+++ b/content/browser/renderer_host/media/video_capture_controller.cc
@@ -149,6 +149,7 @@ VideoCaptureController::VideoCaptureController()
     : consumer_feedback_observer_(nullptr),
       state_(VIDEO_CAPTURE_STATE_STARTED),
       has_received_frames_(false),
+      has_received_onstarted_(false),
       weak_ptr_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 }
@@ -208,13 +209,16 @@ void VideoCaptureController::AddClient(
   if (FindClient(id, event_handler, controller_clients_))
     return;
 
+  // If the device has reported OnStarted event, report it to this client here.
+  if (has_received_onstarted_)
+    event_handler->OnStarted(id);
+
   std::unique_ptr<ControllerClient> client =
       base::MakeUnique<ControllerClient>(id, event_handler, session_id, params);
   // If we already have gotten frame_info from the device, repeat it to the new
   // client.
   if (state_ == VIDEO_CAPTURE_STATE_STARTED) {
     controller_clients_.push_back(std::move(client));
-    return;
   }
 }
 
@@ -463,6 +467,7 @@ void VideoCaptureController::OnLog(const std::string& message) {
 
 void VideoCaptureController::OnStarted() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  has_received_onstarted_ = true;
 
   for (const auto& client : controller_clients_) {
     if (client->session_closed)