Media Controls: move timeline related code to modules.

third_party/WebKit/Source/core/layout/LayoutSlider.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef LayoutSlider_h
 #define LayoutSlider_h
 
+#include "core/CoreExport.h"
 #include "core/layout/LayoutFlexibleBox.h"
 
 namespace blink {
 
 class HTMLInputElement;
 class SliderThumbElement;
 
 class LayoutSlider final : public LayoutFlexibleBox {
  public:
   static const int kDefaultTrackLength;
 
   explicit LayoutSlider(HTMLInputElement*);
   ~LayoutSlider() override;
 
-  bool InDragMode() const;
+  CORE_EXPORT bool InDragMode() const;
 
   const char* GetName() const override { return "LayoutSlider"; }
 
  private:
   bool IsOfType(LayoutObjectType type) const override {
     return type == kLayoutObjectSlider || LayoutFlexibleBox::IsOfType(type);
   }
 
   int BaselinePosition(
       FontBaseline,
       bool first_line,
       LineDirectionMode,
       LinePositionMode = kPositionOnContainingLine) const override;
   void ComputeIntrinsicLogicalWidths(
       LayoutUnit& min_logical_width,
       LayoutUnit& max_logical_width) const override;
   void UpdateLayout() override;
 
   SliderThumbElement* GetSliderThumbElement() const;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSlider, IsSlider());
 
 }  // namespace blink
 
 #endif  // LayoutSlider_h