--- a/media/webrtc/trunk/webrtc/modules/video_capture/android/video_capture_android.cc
+++ b/media/webrtc/trunk/webrtc/modules/video_capture/android/video_capture_android.cc
@@ -111,17 +111,20 @@ rtc::scoped_refptr<VideoCaptureModule> V
   }
   return implementation;
 }
 
 int32_t VideoCaptureAndroid::OnIncomingFrame(uint8_t* videoFrame,
                                              size_t videoFrameLength,
                                              int32_t degrees,
                                              int64_t captureTime) {
-  if (!_captureStarted)
+  // _captureStarted is written on the controlling thread in
+  // StartCapture/StopCapture. This is the camera thread.
+  // CaptureStarted() will access it under a lock.
+  if (!CaptureStarted())
     return 0;
 
   VideoRotation current_rotation =
       (degrees <= 45 || degrees > 315) ? kVideoRotation_0 :
       (degrees > 45 && degrees <= 135) ? kVideoRotation_90 :
       (degrees > 135 && degrees <= 225) ? kVideoRotation_180 :
       (degrees > 225 && degrees <= 315) ? kVideoRotation_270 :
       kVideoRotation_0;  // Impossible.