[MediaSession] Add playbackState attribute to Blink MediaSession and use it to determine playback s…

content/browser/media/session/mock_media_session_player_observer.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 "content/browser/media/session/mock_media_session_player_observer.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
-MockMediaSessionPlayerObserver::MockMediaSessionPlayerObserver() = default;
+MockMediaSessionPlayerObserver::MockMediaSessionPlayerObserver(
+    RenderFrameHost* render_frame_host)
+    : MediaSessionPlayerObserver(), render_frame_host_(render_frame_host) {}
 
 MockMediaSessionPlayerObserver::~MockMediaSessionPlayerObserver() = default;
 
 void MockMediaSessionPlayerObserver::OnSuspend(int player_id) {
   EXPECT_GE(player_id, 0);
   EXPECT_GT(players_.size(), static_cast<size_t>(player_id));
 
   ++received_suspend_calls_;
   players_[player_id].is_playing_ = false;
 }
@@ skipping 12 matching lines @@
   EXPECT_GE(player_id, 0);
   EXPECT_GT(players_.size(), static_cast<size_t>(player_id));
 
   EXPECT_GE(volume_multiplier, 0.0f);
   EXPECT_LE(volume_multiplier, 1.0f);
 
   players_[player_id].volume_multiplier_ = volume_multiplier;
 }
 
 RenderFrameHost* MockMediaSessionPlayerObserver::GetRenderFrameHost() const {
-  return nullptr;
+  return render_frame_host_;
 }
 
 int MockMediaSessionPlayerObserver::StartNewPlayer() {
   players_.push_back(MockPlayer(true, 1.0f));
   return players_.size() - 1;
 }
 
 bool MockMediaSessionPlayerObserver::IsPlaying(size_t player_id) {
   EXPECT_GT(players_.size(), player_id);
   return players_[player_id].is_playing_;
@@ skipping 12 matching lines @@
 
 int MockMediaSessionPlayerObserver::received_suspend_calls() const {
   return received_suspend_calls_;
 }
 
 int MockMediaSessionPlayerObserver::received_resume_calls() const {
   return received_resume_calls_;
 }
 
 }  // namespace content