Pass SkPaint instead of its alpha and mode in WebMediaPlayer::paint

media/blink/webmediaplayer_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 105 matching lines @@
   void setBufferingStrategy(
       blink::WebMediaPlayer::BufferingStrategy buffering_strategy) override;
   blink::WebTimeRanges buffered() const override;
   blink::WebTimeRanges seekable() const override;
 
   // paint() the current video frame into |canvas|. This is used to support
   // various APIs and functionalities, including but not limited to: <canvas>,
   // WebGL texImage2D, ImageBitmap, printing and capturing capabilities.
   void paint(blink::WebCanvas* canvas,
              const blink::WebRect& rect,
-             unsigned char alpha,
-             SkXfermode::Mode mode) override;
+             SkPaint& paint) override;
 
   // True if the loaded media has a playable video/audio track.
   bool hasVideo() const override;
   bool hasAudio() const override;
 
   void enabledAudioTracksChanged(
       const blink::WebVector<blink::WebMediaPlayer::TrackId>& enabledTrackIds)
       override;
   void selectedVideoTrackChanged(
       blink::WebMediaPlayer::TrackId* selectedTrackId) override;
@@ skipping 410 matching lines @@
   // Number of times we've reached BUFFERING_HAVE_NOTHING during playback.
   int underflow_count_;
   std::unique_ptr<base::ElapsedTimer> underflow_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_