Rename {Author,UserAgent}ShadowRoot to {Open,Closed}ShadowRoot.

Source/web/WebFrameWidgetImpl.cpp

 /*
  * Copyright (C) 2014 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 662 matching lines @@
 
 void WebFrameWidgetImpl::handleMouseDown(LocalFrame& mainFrame, const WebMouseEvent& event)
 {
     // Take capture on a mouse down on a plugin so we can send it mouse events.
     // If the hit node is a plugin but a scrollbar is over it don't start mouse
     // capture because it will interfere with the scrollbar receiving events.
     IntPoint point(event.x, event.y);
     if (event.button == WebMouseEvent::ButtonLeft) {
         point = m_localRoot->frameView()->windowToContents(point);
         HitTestResult result(m_localRoot->frame()->eventHandler().hitTestResultAtPoint(point));
-        result.setToShadowHostIfInUserAgentShadowRoot();
+        result.setToShadowHostIfInClosedShadowRoot();
         Node* hitNode = result.innerNonSharedNode();
 
         if (!result.scrollbar() && hitNode && hitNode->renderer() && hitNode->renderer()->isEmbeddedObject()) {
             m_mouseCaptureNode = hitNode;
             TRACE_EVENT_ASYNC_BEGIN0("input", "capturing mouse", this);
         }
     }
 
     PageWidgetEventHandler::handleMouseDown(mainFrame, event);
 
@@ skipping 314 matching lines @@
         } else {
             m_layerTreeView->clearRootLayer();
             m_layerTreeView->clearViewportLayers();
         }
     }
 
     suppressInvalidations(false);
 }
 
 } // namespace blink