Have HTMLCollection::item() return an Element as per specification

Source/web/WebNodeCollection.cpp

Index: Source/web/WebNodeCollection.cpp
diff --git a/Source/web/WebNodeCollection.cpp b/Source/web/WebNodeCollection.cpp
index 1715730473d822a39be3283c2f41dc4ee3b24766..719006456952aa1d7cffbddad11d7374a8e89cc1 100644
--- a/Source/web/WebNodeCollection.cpp
+++ b/Source/web/WebNodeCollection.cpp
@@ -74,10 +74,10 @@ unsigned WebNodeCollection::length() const
 
 WebNode WebNodeCollection::nextItem() const

[Inactive, 2014/02/03 21:33:09]

adamk, what do you think about updating nextItem() and firstItem() to return a
WebElement instead of a WebNode in this patch?

This is trivial now and it should not break anything on Chromium side as
WebElement inherits from WebNode and WebNode has a virtual destructor.

Please let me know if I can update my CL accordingly.

 {
-    Node* node = m_private->item(m_current);
-    if (node)
+    Element* element = m_private->item(m_current);
+    if (element)
         m_current++;
-    return WebNode(node);
+    return WebNode(element);
 }
 
 WebNode WebNodeCollection::firstItem() const