Remove unnecessary inclusions of LayoutObject-derived headers in core/html/

third_party/WebKit/Source/core/html/AutoplayExperimentHelper.cpp

 // 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 "core/html/AutoplayExperimentHelper.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLMediaElement.h"
-#include "core/layout/LayoutBox.h"
-#include "core/layout/LayoutObject.h"
-#include "core/layout/LayoutVideo.h"
 #include "core/page/Page.h"
 #include "platform/Logging.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/geometry/IntRect.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 // Seconds to wait after a video has stopped moving before playing it.
@@ skipping 511 matching lines @@
 {
     return client().isHTMLVideoElement() && (enabled(IfViewport) || enabled(IfPartialViewport));
 }
 
 bool AutoplayExperimentHelper::isExperimentEnabled()
 {
     return m_mode != Mode::ExperimentOff;
 }
 
 } // namespace blink