Link MediaSessionTabHelper with native MediaSession [CL is going to be split]

content/browser/media/session/media_session_browsertest.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/browser/media/session/media_session.h"
 
 #include <stddef.h>
 
 #include <list>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/test/histogram_tester.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "content/browser/media/session/audio_focus_delegate.h"
+#include "content/browser/media/session/media_session_observer.h"
 #include "content/browser/media/session/mock_media_session_player_observer.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_observer.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/shell/browser/shell.h"
 #include "media/base/media_content_type.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using content::WebContents;
-using content::WebContentsObserver;
 using content::MediaSession;
 using content::AudioFocusDelegate;
 using content::MediaSessionPlayerObserver;
 using content::MediaSessionUmaHelper;
 using content::MockMediaSessionPlayerObserver;
 
 using ::testing::Expectation;
 
 namespace {
 
 const double kDefaultVolumeMultiplier = 1.0;
 const double kDuckingVolumeMultiplier = 0.2;
 
 class MockAudioFocusDelegate : public AudioFocusDelegate {
  public:
   bool RequestAudioFocus(content::AudioFocusManager::AudioFocusType) override {
     return true;
   }
 
   void AbandonAudioFocus() override {
   }
 };
 
-class MockWebContentsObserver : public WebContentsObserver {
+class MockMediaSessionObserver : public content::MediaSessionObserver {
  public:
-  MockWebContentsObserver(WebContents* web_contents)
-      : WebContentsObserver(web_contents) {}
+  MockMediaSessionObserver(MediaSession* session)
+      : MediaSessionObserver(session) {}
 
   MOCK_METHOD2(MediaSessionStateChanged,
                void(bool is_controllable, bool is_suspended));
 };
 
 }  // namespace
 
 class MediaSessionBrowserTest : public content::ContentBrowserTest {
  protected:
   MediaSessionBrowserTest() = default;
 
   void SetUpOnMainThread() override {
     ContentBrowserTest::SetUpOnMainThread();
 
-    mock_web_contents_observer_.reset(
-        new MockWebContentsObserver(shell()->web_contents()));
+    mock_media_session_observer_.reset(new MockMediaSessionObserver(
+        MediaSession::Get(shell()->web_contents())));
     media_session_ = MediaSession::Get(shell()->web_contents());
     media_session_->SetDelegateForTests(
         std::unique_ptr<AudioFocusDelegate>(new MockAudioFocusDelegate()));
     ASSERT_TRUE(media_session_);
   }
 
   void TearDownOnMainThread() override {
-    mock_web_contents_observer_.reset();
+    mock_media_session_observer_.reset();
 
     media_session_->RemoveAllPlayersForTest();
     media_session_ = nullptr;
 
     ContentBrowserTest::TearDownOnMainThread();
   }
 
   void StartNewPlayer(
       MockMediaSessionPlayerObserver* player_observer,
       media::MediaContentType media_content_type) {
@@ skipping 57 matching lines @@
   }
 
   void SystemStartDucking() {
     media_session_->StartDucking();
   }
 
   void SystemStopDucking() {
     media_session_->StopDucking();
   }
 
-  MockWebContentsObserver* mock_web_contents_observer() {
-    return mock_web_contents_observer_.get();
+  MockMediaSessionObserver* mock_media_session_observer() {
+    return mock_media_session_observer_.get();
   }
 
   std::unique_ptr<MediaSession> CreateDummyMediaSession() {
     return std::unique_ptr<MediaSession>(new MediaSession(nullptr));
   }
 
   MediaSessionUmaHelper* GetMediaSessionUMAHelper() {
     return media_session_->uma_helper_for_test();
   }
 
  protected:
   MediaSession* media_session_;
-  std::unique_ptr<MockWebContentsObserver> mock_web_contents_observer_;
+  std::unique_ptr<MockMediaSessionObserver> mock_media_session_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSessionBrowserTest);
 };
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        PlayersFromSameObserverDoNotStopEachOtherInSameSession) {
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
@@ skipping 403 matching lines @@
   EXPECT_TRUE(player_observer->IsPlaying(0));
   EXPECT_TRUE(player_observer->IsPlaying(1));
   EXPECT_TRUE(player_observer->IsPlaying(2));
   EXPECT_TRUE(player_observer->IsPlaying(3));
 
   EXPECT_EQ(content::AudioFocusManager::AudioFocusType::Gain,
             GetSessionAudioFocusType());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest, ControlsShowForContent) {
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false));
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   // Starting a player with a content type should show the media controls.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest, ControlsNoShowForTransient) {
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, false));
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   // Starting a player with a transient type should not show the media controls.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Transient);
 
   EXPECT_FALSE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest, ControlsHideWhenStopped) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   RemovePlayers(player_observer.get());
 
   EXPECT_FALSE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest, ControlsShownAcceptTransient) {
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false));
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   // Transient player join the session without affecting the controls.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Transient);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsShownAfterContentAdded) {
   Expectation dontShowControls = EXPECT_CALL(
-      *mock_web_contents_observer(), MediaSessionStateChanged(false, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+      *mock_media_session_observer(), MediaSessionStateChanged(false, false));
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false))
       .After(dontShowControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Transient);
 
   // The controls are shown when the content player is added.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsStayIfOnlyOnePlayerHasBeenPaused) {
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false));
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Transient);
 
   // Removing only content player doesn't hide the controls since the session
   // is still active.
   RemovePlayer(player_observer.get(), 0);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsHideWhenTheLastPlayerIsRemoved) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, true))
       .After(showControls);
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   RemovePlayer(player_observer.get(), 0);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 
   RemovePlayer(player_observer.get(), 1);
 
   EXPECT_FALSE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsHideWhenAllThePlayersAreRemoved) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   RemovePlayers(player_observer.get());
 
   EXPECT_FALSE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsNotHideWhenTheLastPlayerIsPaused) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   OnPlayerPaused(player_observer.get(), 0);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 
   OnPlayerPaused(player_observer.get(), 1);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        SuspendTemporaryUpdatesControls) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   SystemSuspend(true);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest, ControlsUpdatedWhenResumed) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   SystemSuspend(true);
   SystemResume();
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsHideWhenSessionSuspendedPermanently) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   SystemSuspend(false);
 
   EXPECT_FALSE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ConstrolsHideWhenSessionStops) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, true))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   media_session_->Stop(MediaSession::SuspendType::UI);
 
   EXPECT_FALSE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsHideWhenSessionChangesFromContentToTransient) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(false, false))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   SystemSuspend(true);
 
   // This should reset the session and change it to a transient, so
   // hide the controls.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Transient);
 
   EXPECT_FALSE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsUpdatedWhenNewPlayerResetsSession) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   SystemSuspend(true);
 
   // This should reset the session and update the controls.
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsResumedWhenPlayerIsResumed) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   SystemSuspend(true);
 
   // This should resume the session and update the controls.
   AddPlayer(player_observer.get(), 0,
             media::MediaContentType::Persistent);
 
   EXPECT_TRUE(IsControllable());
   EXPECT_FALSE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsUpdatedDueToResumeSessionAction) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, true))
       .After(showControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   UISuspend();
 
   EXPECT_TRUE(IsControllable());
   EXPECT_TRUE(IsSuspended());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaSessionBrowserTest,
                        ControlsUpdatedDueToSuspendSessionAction) {
-  Expectation showControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation showControls = EXPECT_CALL(*mock_media_session_observer(),
                                          MediaSessionStateChanged(true, false));
-  Expectation pauseControls = EXPECT_CALL(*mock_web_contents_observer(),
+  Expectation pauseControls = EXPECT_CALL(*mock_media_session_observer(),
                                           MediaSessionStateChanged(true, true))
                                   .After(showControls);
-  EXPECT_CALL(*mock_web_contents_observer(),
+  EXPECT_CALL(*mock_media_session_observer(),
               MediaSessionStateChanged(true, false))
       .After(pauseControls);
 
   std::unique_ptr<MockMediaSessionPlayerObserver> player_observer(
       new MockMediaSessionPlayerObserver);
 
   StartNewPlayer(player_observer.get(),
                  media::MediaContentType::Persistent);
   UISuspend();
   UIResume();
@@ skipping 369 matching lines @@
                  media::MediaContentType::Persistent);
   clock->Advance(base::TimeDelta::FromMilliseconds(1000));
   media_session_->Stop(MediaSession::SuspendType::UI);
 
   std::unique_ptr<base::HistogramSamples> samples(
       tester.GetHistogramSamplesSinceCreation("Media.Session.ActiveTime"));
   EXPECT_EQ(2, samples->TotalCount());
   EXPECT_EQ(1, samples->GetCount(1000));
   EXPECT_EQ(1, samples->GetCount(10000));
 }