Made Blink tooltip ShadowDOM-aware

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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 931 matching lines @@
     if (!m_frame->contentRenderer())
         return result;
 
     // hitTestResultAtPoint is specifically used to hitTest into all frames, thus it always allows child frame content.
     HitTestRequest request(hitType | HitTestRequest::AllowChildFrameContent);
     m_frame->contentRenderer()->hitTest(request, result);
     if (!request.readOnly())
         m_frame->document()->updateHoverActiveState(request, result.innerElement());
 
     if (request.disallowsShadowContent())
-        result.setToNonShadowAncestor();
+        result.setToNodesInDocumentTreeScope();
 
     return result;
 }
 
 void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
 {
     m_autoscrollController->stopAutoscrollTimer(rendererIsBeingDestroyed);
 }
 
 Node* EventHandler::mousePressNode() const
@@ skipping 495 matching lines @@
     if (RenderLayer* layer = layerForNode(hoveredNode.innerNode())) {
         if (FrameView* frameView = m_frame->view()) {
             if (frameView->containsScrollableArea(layer))
                 layer->mouseMovedInContentArea();
         }
     }
 
     if (FrameView* frameView = m_frame->view())
         frameView->mouseMovedInContentArea();  
 
-    hoveredNode.setToNonShadowAncestor();
+    hoveredNode.setToShadowHostIfInUserAgentShadowRoot();
     page->chrome()->mouseDidMoveOverElement(hoveredNode, event.modifierFlags());
     page->chrome()->setToolTip(hoveredNode);
 
     return result;
 }
 
 bool EventHandler::passMouseMovedEventToScrollbars(const PlatformMouseEvent& event)
 {
     HitTestResult hoveredNode;
     return handleMouseMoveEvent(event, &hoveredNode, true);
@@ skipping 2441 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(DARWIN)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore