Provide a WebContents API to discover the playback of a fullscreen video.

content/renderer/media/renderer_webmediaplayer_delegate.cc

 // Copyright 2015 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.
 
 #include "content/renderer/media/renderer_webmediaplayer_delegate.h"
 
 #include <stdint.h>
 
 #include "base/auto_reset.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 150 matching lines @@
   // time idle cleanup runs.
   idle_player_map_[player_id] = tick_clock_->NowTicks() - idle_timeout_;
 
   ScheduleUpdateTask();
 }
 
 bool RendererWebMediaPlayerDelegate::IsStale(int player_id) {
   return stale_players_.count(player_id);
 }
 
+void RendererWebMediaPlayerDelegate::SetIsEffectivelyFullscreen(
+    int player_id,
+    bool is_fullscreen) {
+  Send(new MediaPlayerDelegateHostMsg_OnMediaEffectivelyFullscreenChange(
+      routing_id(), player_id, is_fullscreen));
+}
+
 void RendererWebMediaPlayerDelegate::WasHidden() {
   RecordAction(base::UserMetricsAction("Media.Hidden"));
 
   for (IDMap<Observer*>::iterator it(&id_map_); !it.IsAtEnd(); it.Advance())
     it.GetCurrentValue()->OnFrameHidden();
 
   ScheduleUpdateTask();
 }
 
 void RendererWebMediaPlayerDelegate::WasShown() {
@@ skipping 183 matching lines @@
       player->OnIdleTimeout();
     }
   }
 }
 
 void RendererWebMediaPlayerDelegate::OnDestruct() {
   delete this;
 }
 
 }  // namespace media