Notify WebMediaPlayer when its ancestor enters/exists fullscreen.

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 163 matching lines @@
 
   blink::WebAudioSourceProvider* getAudioSourceProvider() override;
 
   void setContentDecryptionModule(
       blink::WebContentDecryptionModule* cdm,
       blink::WebContentDecryptionModuleResult result) override;
 
   bool supportsOverlayFullscreenVideo() override;
   void enteredFullscreen() override;
   void exitedFullscreen() override;
+  void enterFullWindow() override;
+  bool isFullWindow() override;
+  void exitFullWindow() override;
 
   // WebMediaPlayerDelegate::Observer implementation.
   void OnHidden() override;
   void OnShown() override;
   void OnSuspendRequested(bool must_suspend) override;
   void OnPlay() override;
   void OnPause() override;
   void OnVolumeMultiplierUpdate(double multiplier) override;
 
 #if defined(OS_ANDROID)  // WMPI_CAST
@@ skipping 353 matching lines @@
   base::OneShotTimer background_pause_timer_;
 
   // Monitors the watch time of the played content.
   std::unique_ptr<WatchTimeReporter> watch_time_reporter_;
   bool is_encrypted_;
 
   // Number of times we've reached BUFFERING_HAVE_NOTHING during playback.
   int underflow_count_;
   std::unique_ptr<base::ElapsedTimer> underflow_timer_;
 
+  // Whether the video covers most of the window when its ancestor enters full
+  // screen.
+  bool is_full_window_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_