Update of change event for range input type

Source/core/html/shadow/SliderThumbElement.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 287 matching lines @@
     }
 
     String valueString = serializeForNumberType(value);
     if (valueString == input->value())
         return;
 
     // FIXME: This is no longer being set from renderer. Consider updating the method name.
     input->setValueFromRenderer(valueString);
     if (renderer())
         renderer()->setNeedsLayout();
-    input->dispatchFormControlChangeEvent();
 }
 
 void SliderThumbElement::startDragging()
 {
     if (Frame* frame = document().frame()) {
         frame->eventHandler().setCapturingMouseEventsNode(this);
         m_inDragMode = true;
     }
 }
 
 void SliderThumbElement::stopDragging()
 {
     if (!m_inDragMode)
         return;
 
     if (Frame* frame = document().frame())
         frame->eventHandler().setCapturingMouseEventsNode(0);
     m_inDragMode = false;
     if (renderer())
         renderer()->setNeedsLayout();
+    hostInput()->dispatchFormControlChangeEvent();
 }
 
 void SliderThumbElement::defaultEventHandler(Event* event)
 {
     if (!event->isMouseEvent()) {
         HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     // FIXME: Should handle this readonly/disabled check in more general way.
@@ skipping 126 matching lines @@
     case MediaVolumeSliderThumbPart:
     case MediaFullScreenVolumeSliderPart:
     case MediaFullScreenVolumeSliderThumbPart:
         return mediaSliderContainer;
     default:
         return sliderContainer;
     }
 }
 
 }