[Media] Disable background video optimization for streaming videos

media/blink/webmediaplayer_impl.h

Index: media/blink/webmediaplayer_impl.h
diff --git a/media/blink/webmediaplayer_impl.h b/media/blink/webmediaplayer_impl.h
index ac80c099c3ec0199b182fdce94cd6a6867b32c6b..54021e6496e7ae93dbdc103fb91cdd3b74747909 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -364,6 +364,9 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   // Returns true if the player is hidden.
   bool IsHidden() const;
 
+  // Returns true if the player's source is streaming.
+  bool IsStreaming() const;
+
   // Return whether |pipeline_metadata_| is compatible with an overlay. This
   // is intended for android.
   bool DoesOverlaySupportMetadata() const;