Pretend the video has no audio track if it is playing as part of autoplay muted.

media/blink/webmediaplayer_impl_unittest.cc

Index: media/blink/webmediaplayer_impl_unittest.cc
diff --git a/media/blink/webmediaplayer_impl_unittest.cc b/media/blink/webmediaplayer_impl_unittest.cc
index f903c2d07810ca84704a10c299831241e273c81e..ab422cfb63fe7a066ec8cd8538a6fc4f72e4f816 100644
--- a/media/blink/webmediaplayer_impl_unittest.cc
+++ b/media/blink/webmediaplayer_impl_unittest.cc
@@ -84,9 +84,14 @@ class DummyWebMediaPlayerClient : public blink::WebMediaPlayerClient {
   void connectedToRemoteDevice() override {}
   void disconnectedFromRemoteDevice() override {}
   void cancelledRemotePlaybackRequest() override {}
+  bool isAutoplayingMuted() override { return is_autoplaying_muted_; }
   void requestReload(const blink::WebURL& newUrl) override {}
 
+  void set_is_autoplaying_muted(bool value) { is_autoplaying_muted_ = value; }
+
  private:
+  bool is_autoplaying_muted_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(DummyWebMediaPlayerClient);
 };
 
@@ -215,6 +220,10 @@ class WebMediaPlayerImplTest : public testing::Test {
     return wmpi_->UpdatePlayState_ComputePlayState(false, false, false);
   }
 
+  void SetDelegateState(WebMediaPlayerImpl::DelegateState state) {
+    wmpi_->SetDelegateState(state);
+  }
+
   bool IsSuspended() { return wmpi_->pipeline_controller_.IsSuspended(); }
 
   void AddBufferedRanges() {
@@ -653,4 +662,34 @@ TEST_F(WebMediaPlayerImplTest, ComputePlayState_BackgroundedVideoPaused) {
   EXPECT_TRUE(state.is_suspended);
 }
 
+TEST_F(WebMediaPlayerImplTest, AutoplayMuted_StartsAndStops) {
+  InitializeDefaultWebMediaPlayerImpl();
+  SetMetadata(true, true);
+  SetReadyState(blink::WebMediaPlayer::ReadyStateHaveFutureData);
+  SetPaused(false);
+
+  EXPECT_CALL(delegate_, DidPlay(_, true, false, false, _));
+  client_.set_is_autoplaying_muted(true);
+  SetDelegateState(WebMediaPlayerImpl::DelegateState::PLAYING);
+
+  EXPECT_CALL(delegate_, DidPlay(_, true, true, false, _));
+  client_.set_is_autoplaying_muted(false);
+  SetDelegateState(WebMediaPlayerImpl::DelegateState::PLAYING);
+}
+
+TEST_F(WebMediaPlayerImplTest, AutoplayMuted_SetVolume) {
+  InitializeDefaultWebMediaPlayerImpl();
+  SetMetadata(true, true);
+  SetReadyState(blink::WebMediaPlayer::ReadyStateHaveFutureData);
+  SetPaused(false);
+
+  EXPECT_CALL(delegate_, DidPlay(_, true, false, false, _));
+  client_.set_is_autoplaying_muted(true);
+  SetDelegateState(WebMediaPlayerImpl::DelegateState::PLAYING);
+
+  EXPECT_CALL(delegate_, DidPlay(_, true, true, false, _));
+  client_.set_is_autoplaying_muted(false);
+  wmpi_->setVolume(1.0);
+}
+
 }  // namespace media