Tab/Desktop capture: Fix for super-old frame after resume.

media/capture/content/screen_capture_device_core.h

Index: media/capture/content/screen_capture_device_core.h
diff --git a/media/capture/content/screen_capture_device_core.h b/media/capture/content/screen_capture_device_core.h
index 60faf27e3fc9f51417f19bd0a62dc022fe743036..60b99e09ee841881ca877a25f5e8c4289a03eefd 100644
--- a/media/capture/content/screen_capture_device_core.h
+++ b/media/capture/content/screen_capture_device_core.h
@@ -122,6 +122,12 @@ class CAPTURE_EXPORT ScreenCaptureDeviceCore
   // component of the system with direct access to |client_|.
   scoped_refptr<ThreadSafeCaptureOracle> oracle_proxy_;
 
+  // After Resume(), some unknown amount of time has passed, and the content of
+  // the capture source may have changed. This flag is used to ensure that the
+  // passive refresh mechanism is not used for the first refresh frame following
+  // a Resume().
+  bool force_active_refresh_once_;
+
   DISALLOW_COPY_AND_ASSIGN(ScreenCaptureDeviceCore);
 };