Make scrubbing a MediaControls-internal concept

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * 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 340 matching lines @@
 {
     RefPtr<MediaControlTimelineElement> timeline = adoptRef(new MediaControlTimelineElement(mediaControls));
     timeline->ensureUserAgentShadowRoot();
     timeline->setType("range");
     timeline->setAttribute(stepAttr, "any");
     return timeline.release();
 }
 
 void MediaControlTimelineElement::defaultEventHandler(Event* event)
 {
-    // Left button is 0. Rejects mouse events not from left button.
-    if (event->isMouseEvent() && toMouseEvent(event)->button())
+    if (event->isMouseEvent() && toMouseEvent(event)->button() != LeftButton)
         return;
 
     if (!inDocument() || !document().isActive())
         return;
 
     if (event->type() == EventTypeNames::mousedown)
-        mediaControllerInterface().beginScrubbing();
+        mediaControls().beginScrubbing();
 
     if (event->type() == EventTypeNames::mouseup)
-        mediaControllerInterface().endScrubbing();
+        mediaControls().endScrubbing();
 
     MediaControlInputElement::defaultEventHandler(event);
 
     if (event->type() == EventTypeNames::mouseover || event->type() == EventTypeNames::mouseout || event->type() == EventTypeNames::mousemove)
         return;
 
     double time = value().toDouble();
     if (event->type() == EventTypeNames::input && time != mediaControllerInterface().currentTime())
         mediaControllerInterface().setCurrentTime(time, IGNORE_EXCEPTION);
 
@@ skipping 291 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace WebCore