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

media/blink/webmediaplayer_impl_unittest.cc

 // Copyright 2016 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 "media/blink/webmediaplayer_impl.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 128 matching lines @@
   void ClearStaleFlag(int player_id) override {
     DCHECK_EQ(player_id_, player_id);
     is_stale_ = false;
   }
 
   bool IsStale(int player_id) override {
     DCHECK_EQ(player_id_, player_id);
     return is_stale_;
   }
 
+  void SetIsEffectivelyFullscreen(int player_id, bool value) override {
+    DCHECK_EQ(player_id_, player_id);
+  }
+
   bool IsFrameHidden() override { return is_hidden_; }
 
   bool IsFrameClosed() override { return is_closed_; }
 
   void SetIdleForTesting(bool is_idle) { is_idle_ = is_idle; }
 
   void SetStaleForTesting(bool is_stale) {
     is_idle_ |= is_stale;
     is_stale_ = is_stale;
   }
@@ skipping 622 matching lines @@
 
   // Average keyframe distance is too big.
   SetVideoKeyframeDistanceAverage(base::TimeDelta::FromSeconds(100));
   SetDuration(base::TimeDelta::FromSeconds(300));
   EXPECT_FALSE(IsBackgroundOptimizationCandidate());
   EXPECT_FALSE(ShouldPauseVideoWhenHidden());
   EXPECT_FALSE(ShouldDisableVideoWhenHidden());
 }
 
 }  // namespace media