Redraw media volume slider when it is moving

third_party/WebKit/Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google 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 12 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaControlElements_h
 #define MediaControlElements_h
 
+#include "core/CoreExport.h"
 #include "core/html/shadow/MediaControlElementTypes.h"
 #include "public/platform/WebLocalizedString.h"
 
 namespace blink {
 
 class TextTrack;
 
 // ----------------------------
 
 class MediaControlPanelElement final : public MediaControlDivElement {
@@ skipping 302 matching lines @@
 };
 
 // ----------------------------
 
 class MediaControlVolumeSliderElement final : public MediaControlInputElement {
  public:
   static MediaControlVolumeSliderElement* create(MediaControls&);
 
   bool willRespondToMouseMoveEvents() override;
   bool willRespondToMouseClickEvents() override;
-  void setVolume(double);
+  CORE_EXPORT void setVolume(double);
 
  private:
   explicit MediaControlVolumeSliderElement(MediaControls&);
 
   void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------
 
@@ skipping 13 matching lines @@
  public:
   static MediaControlCurrentTimeDisplayElement* create(MediaControls&);
 
  private:
   explicit MediaControlCurrentTimeDisplayElement(MediaControls&);
 };
 
 }  // namespace blink
 
 #endif  // MediaControlElements_h