getUserMeida: report device starting states

media/capture/content/thread_safe_capture_oracle.cc

Index: media/capture/content/thread_safe_capture_oracle.cc
diff --git a/media/capture/content/thread_safe_capture_oracle.cc b/media/capture/content/thread_safe_capture_oracle.cc
index 610b756bd73d6ee157e3d8676c2b7bbd1cb3e743..6824067612930461385c02d791a841c9679775d4 100644
--- a/media/capture/content/thread_safe_capture_oracle.cc
+++ b/media/capture/content/thread_safe_capture_oracle.cc
@@ -198,6 +198,12 @@ void ThreadSafeCaptureOracle::ReportError(
     client_->OnError(from_here, reason);
 }
 
+void ThreadSafeCaptureOracle::ReportStarted() {
+  base::AutoLock guard(lock_);
+  if (client_)
+    client_->OnStarted();
+}
+
 void ThreadSafeCaptureOracle::DidCaptureFrame(
     int frame_number,
     VideoCaptureDevice::Client::Buffer buffer,