Remove |use_fallback_path_| from WMPI

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 dd29a3380a0b3edde32f29e22d49d386656f2a6b..fe7132453c06d8bf04cefa42790a99d9119be5d5 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -656,8 +656,15 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
 
   // Used for HLS playback and in certain fallback paths (e.g. on older devices
   // that can't support the unified media pipeline).
-  GURL fallback_url_;
-  bool use_fallback_path_;
+  GURL loaded_url_;
+
+  // NOTE: |using_media_player_renderer_| is set based on the usage of a
+  // MediaResource::Type::URL in StartPipeline(). This currently works because
+  // the MediaPlayerRendererClient factory is the only factory that returns that
+  // Type, but this may no longer be accurate when we remove |cast_impl_| and
+  // WebMediaPlayerCast. This flag should be renamed/updated accordingly when
+  // removing |cast_impl_|.
+  bool using_media_player_renderer_;
 
   // Called sometime after the media is suspended in a playing state in
   // OnFrameHidden(), causing the state to change to paused.