Have getElementsByClassName() / getElementsByTagName*() return an HTMLCollection

Source/web/WebNode.cpp

Index: Source/web/WebNode.cpp
diff --git a/Source/web/WebNode.cpp b/Source/web/WebNode.cpp
index d069fbd48f24f35d334d96567f414ee45dc28a16..ba4168ea944a262105a6119d8d94607a364ebe43 100644
--- a/Source/web/WebNode.cpp
+++ b/Source/web/WebNode.cpp
@@ -38,17 +38,18 @@
 #include "WebDocument.h"
 #include "WebElement.h"
 #include "WebFrameImpl.h"
+#include "WebNodeCollection.h"
 #include "WebNodeList.h"
 #include "WebPluginContainer.h"
 #include "WebPluginContainerImpl.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
-#include "core/dom/EmptyNodeList.h"
-#include "core/events/Event.h"
 #include "core/dom/Node.h"
 #include "core/dom/NodeList.h"
 #include "core/editing/markup.h"
+#include "core/events/Event.h"
+#include "core/html/HTMLCollection.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderWidget.h"
 #include "platform/Widget.h"
@@ -191,11 +192,11 @@ void WebNode::simulateClick()
     m_private->dispatchSimulatedClick(0);
 }
 
-WebNodeList WebNode::getElementsByTagName(const WebString& tag) const
+WebNodeCollection WebNode::getElementsByTagName(const WebString& tag) const
 {
     if (m_private->isContainerNode())
-        return WebNodeList(toContainerNode(m_private.get())->getElementsByTagName(tag));
-    return WebNodeList(EmptyNodeList::create(m_private.get()));
+        return WebNodeCollection(toContainerNode(m_private.get())->getElementsByTagName(tag));
+    return WebNodeCollection();
 }
 
 WebElement WebNode::querySelector(const WebString& tag, WebExceptionCode& ec) const