Don't dispatch a 'click' event for mousedown/mouseup across form controls.

Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 977 matching lines @@
         if (current == this)
             return true;
         if (current->isDocumentFragment() && toDocumentFragment(current)->isTemplateContent())
             current = static_cast<const TemplateContentDocumentFragment*>(current)->host();
         else
             current = current->parentOrShadowHostNode();
     } while (current);
     return false;
 }
 
-Node* Node::commonAncestorOverShadowBoundary(const Node& other)
+Node* Node::commonAncestor(const Node& other, Node* (*parent)(const Node&))
 {
     if (this == other)
         return this;
     if (document() != other.document())
         return 0;
     int thisDepth = 0;
-    for (Node* node = this; node; node = node->parentOrShadowHostNode()) {
+    for (Node* node = this; node; node = parent(*node)) {
         if (node == &other)
             return node;
         thisDepth++;
     }
     int otherDepth = 0;
-    for (const Node* node = &other; node; node = node->parentOrShadowHostNode()) {
+    for (const Node* node = &other; node; node = parent(*node)) {
         if (node == this)
             return this;
         otherDepth++;
     }
     Node* thisIterator = this;
     const Node* otherIterator = &other;
     if (thisDepth > otherDepth) {
         for (int i = thisDepth; i > otherDepth; --i)
-            thisIterator = thisIterator->parentOrShadowHostNode();
+            thisIterator = parent(*thisIterator);
     } else if (otherDepth > thisDepth) {
         for (int i = otherDepth; i > thisDepth; --i)
-            otherIterator = otherIterator->parentOrShadowHostNode();
+            otherIterator = parent(*otherIterator);
     }
     while (thisIterator) {
         if (thisIterator == otherIterator)
             return thisIterator;
-        thisIterator = thisIterator->parentOrShadowHostNode();
-        otherIterator = otherIterator->parentOrShadowHostNode();
+        thisIterator = parent(*thisIterator);
+        otherIterator = parent(*otherIterator);
     }
     ASSERT(!otherIterator);
     return 0;
 }
 
 void Node::reattach(const AttachContext& context)
 {
     AttachContext reattachContext(context);
     reattachContext.performingReattach = true;
 
@@ skipping 1697 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const WebCore::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif