Move core MediaControls implementation to modules/media_controls/.

third_party/WebKit/Source/core/html/media/HTMLMediaElementControlsList.h

 // Copyright 2017 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.
 
 #ifndef HTMLMediaElementControlsList_h
 #define HTMLMediaElementControlsList_h
 
+#include "core/CoreExport.h"
 #include "core/dom/DOMTokenList.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class HTMLMediaElement;
 
 class HTMLMediaElementControlsList final : public DOMTokenList,
                                            public DOMTokenListObserver {
   USING_GARBAGE_COLLECTED_MIXIN(HTMLMediaElementControlsList);
 
  public:
   static HTMLMediaElementControlsList* create(HTMLMediaElement* element) {
     return new HTMLMediaElementControlsList(element);
   }
 
   ~HTMLMediaElementControlsList() override;
 
   DECLARE_VIRTUAL_TRACE();
 
   // Whether the list dictates to hide a certain control.
-  bool shouldHideDownload() const;
-  bool shouldHideFullscreen() const;
-  bool shouldHideRemotePlayback() const;
+  CORE_EXPORT bool shouldHideDownload() const;
+  CORE_EXPORT bool shouldHideFullscreen() const;
+  CORE_EXPORT bool shouldHideRemotePlayback() const;
 
  private:
   explicit HTMLMediaElementControlsList(HTMLMediaElement*);
   bool validateTokenValue(const AtomicString&, ExceptionState&) const override;
 
   // DOMTokenListObserver.
   void valueWasSet() override;
 
   Member<HTMLMediaElement> m_element;
 };
 
 }  // namespace blink
 
 #endif