Fix crash in ScreenRecorder

remoting/host/screen_recorder.h

Index: remoting/host/screen_recorder.h
diff --git a/remoting/host/screen_recorder.h b/remoting/host/screen_recorder.h
index 0426ea7a761165f822b5d2b636c7c009011528bc..3c67438d7943aa36eea4b88214185df48bca0c10 100644
--- a/remoting/host/screen_recorder.h
+++ b/remoting/host/screen_recorder.h
@@ -180,9 +180,10 @@ class ScreenRecorder : public base::RefCountedThreadSafe<ScreenRecorder> {
   // be used on the capture thread.
   bool is_recording_;
 
-  // Flag that indicates network is being stopped. This variable should only
-  // be used on the network thread.
+  // Per-thread flags that are set when the ScreenRecorder
+  // stopped. They must be used on the corresponding threads only.
   bool network_stopped_;
+  bool encoder_stopped_;
 
   // Timer that calls DoCapture.
   base::RepeatingTimer<ScreenRecorder> capture_timer_;