getUserMeida: report device starting states

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 5f2136bd6f79bd48fe3c8f4c297772a6a4d3e6e6..54744722acaf0751b6f2ab312bad2d52bbd7b852 100644
--- a/content/browser/renderer_host/media/video_capture_controller.cc
+++ b/content/browser/renderer_host/media/video_capture_controller.cc
@@ -484,6 +484,17 @@ void VideoCaptureController::OnLog(const std::string& message) {
   MediaStreamManager::SendMessageToNativeLog("Video capture: " + message);
 }
 
+void VideoCaptureController::OnStarted() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  state_ = VIDEO_CAPTURE_STATE_STARTED;
+
+  for (const auto& client : controller_clients_) {
+    if (client->session_closed)
+      continue;
+    client->event_handler->OnStarted(client->controller_id);
+  }
+}
+
 void VideoCaptureController::OnBufferDestroyed(int buffer_id_to_drop) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);