Remove newMediaPlaybackUi flag from content/ and Blink.

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

 /*
  * 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 206 matching lines @@
     [RaisesException] float pageScaleFactor();
     [RaisesException] void setPageScaleFactor(float scaleFactor);
     [RaisesException] void setPageScaleFactorLimits(float minScaleFactor, float maxScaleFactor);
 
     [RaisesException] void setIsCursorVisible(Document document, boolean isVisible);
 
     double effectiveMediaVolume(HTMLMediaElement mediaElement);
     DOMString effectivePreload(HTMLMediaElement mediaElement);
     void mediaPlayerRemoteRouteAvailabilityChanged(HTMLMediaElement mediaElement, boolean available);
     void mediaPlayerPlayingRemotelyChanged(HTMLMediaElement mediaElement, boolean remote);
-    void setAllowHiddenVolumeControls(HTMLMediaElement mediaElement, boolean allow);
 
     void registerURLSchemeAsBypassingContentSecurityPolicy(DOMString scheme);
     void registerURLSchemeAsBypassingContentSecurityPolicy(DOMString scheme, sequence<DOMString> policyAreas);
     void removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(DOMString scheme);
 
     TypeConversions typeConversions();
 
     // This is enabled only in Debug builds.
     // This is because we want to avoid putting the byte stream of testing private scripts
     // into the binary of Release builds.
@@ skipping 119 matching lines @@
     DOMString getScrollAnimationState(Node node);
 
     DOMString getProgrammaticScrollAnimationState(Node node);
 
     ClientRect visualRect(Node node);
 
     OriginTrialsTest originTrialsTest();
 
     void crash();
 };