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

public/web/WebNode.h

Index: public/web/WebNode.h
diff --git a/public/web/WebNode.h b/public/web/WebNode.h
index 2457e70561d7b3b2790c8a786f4e31371b36acdf..22e58b11d41a7fc73c75c3c4e81b57cc54417355 100644
--- a/public/web/WebNode.h
+++ b/public/web/WebNode.h
@@ -45,6 +45,7 @@ class WebDOMEventListenerPrivate;
 class WebDocument;
 class WebElement;
 class WebFrame;
+class WebNodeCollection;
 class WebNodeList;
 class WebPluginContainer;
 
@@ -113,7 +114,7 @@ public:
     BLINK_EXPORT void addEventListener(const WebString& eventType, WebDOMEventListener* listener, bool useCapture);
     BLINK_EXPORT bool dispatchEvent(const WebDOMEvent&);
     BLINK_EXPORT void simulateClick();
-    BLINK_EXPORT WebNodeList getElementsByTagName(const WebString&) const;
+    BLINK_EXPORT WebNodeCollection getElementsByTagName(const WebString&) const;
     BLINK_EXPORT WebElement querySelector(const WebString&, WebExceptionCode&) const;
     BLINK_EXPORT WebElement rootEditableElement() const;
     BLINK_EXPORT bool focused() const;