Make Gesture Tap be aware of Shadow DOM.

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 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:
  *
  *     * 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 1031 matching lines @@
     IntPoint point = mainFrameImpl()->frameView()->windowToContents(IntPoint(rect.x, rect.y));
     HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active | (ignoreClipping ? HitTestRequest::IgnoreClipping : 0);
     HitTestResult result = mainFrameImpl()->frame()->eventHandler().hitTestResultAtPoint(point, hitType, IntSize(rect.width, rect.height));
 
     Node* node = result.innerNonSharedNode();
     if (!node)
         return WebRect();
 
     // Find the block type node based on the hit node.
     while (node && (!node->renderer() || node->renderer()->isInline()))
-        node = node->parentNode();
+        node = NodeRenderingTraversal::parent(node);
 
     // Return the bounding box in the window coordinate system.
     if (node) {
         IntRect rect = node->Node::pixelSnappedBoundingBox();
         LocalFrame* frame = node->document().frame();
         return frame->view()->contentsToWindow(rect);
     }
     return WebRect();
 }
 
@@ skipping 103 matching lines @@
 
 static Node* findCursorDefiningAncestor(Node* node, LocalFrame* frame)
 {
     // Go up the tree to find the node that defines a mouse cursor style
     while (node) {
         if (node->renderer()) {
             ECursor cursor = node->renderer()->style()->cursor();
             if (cursor != CURSOR_AUTO || frame->eventHandler().useHandCursor(node, node->isLink()))
                 break;
         }
-        node = node->parentNode();
+        node = NodeRenderingTraversal::parent(node);
     }
 
     return node;
 }
 
 static bool showsHandCursor(Node* node, LocalFrame* frame)
 {
     if (!node || !node->renderer())
         return false;
 
@@ skipping 10 matching lines @@
         return 0;
 
     // FIXME: Rely on earlier hit test instead of hit testing again.
     GestureEventWithHitTestResults targetedEvent =
         m_page->deprecatedLocalMainFrame()->eventHandler().targetGestureEvent(tapEvent, true);
     Node* bestTouchNode = targetedEvent.hitTestResult().targetNode();
 
     // We might hit something like an image map that has no renderer on it
     // Walk up the tree until we have a node with an attached renderer
     while (bestTouchNode && !bestTouchNode->renderer())
-        bestTouchNode = bestTouchNode->parentNode();
+        bestTouchNode = NodeRenderingTraversal::parent(bestTouchNode);
 
     Node* cursorDefiningAncestor =
         findCursorDefiningAncestor(bestTouchNode, m_page->deprecatedLocalMainFrame());
     // We show a highlight on tap only when the current node shows a hand cursor
     if (!cursorDefiningAncestor || !showsHandCursor(cursorDefiningAncestor, m_page->deprecatedLocalMainFrame())) {
         return 0;
     }
 
     // We should pick the largest enclosing node with hand cursor set. We do this by first jumping
     // up to cursorDefiningAncestor (which is already known to have hand cursor set). Then we locate
@@ skipping 3040 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink