Include viewport visibility checks for autoplay experiment.

third_party/WebKit/Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2551 matching lines @@
 }
 
 void Internals::setMediaElementNetworkState(HTMLMediaElement* mediaElement, int state)
 {
     ASSERT(mediaElement);
     ASSERT(state >= HTMLMediaElement::NetworkState::NETWORK_EMPTY);
     ASSERT(state <= HTMLMediaElement::NetworkState::NETWORK_NO_SOURCE);
     mediaElement->setNetworkState(static_cast<WebMediaPlayer::NetworkState>(state));
 }
 
+// TODO(liberato): remove once autoplay gesture override experiment concludes.
+void Internals::triggerAutoplayViewportCheck(HTMLMediaElement* element)
+{
+    element->triggerAutoplayViewportCheckForTesting();
+}
+
 } // namespace blink