Defer iframe JavaScript URL evaluation

Source/core/html/HTMLFrameElementBase.h

Index: Source/core/html/HTMLFrameElementBase.h
diff --git a/Source/core/html/HTMLFrameElementBase.h b/Source/core/html/HTMLFrameElementBase.h
index eafb61c222d007ea275ce6a0fca84fc50e03a1fc..2be96d04815353de98c34caf37836b1ad1194c09 100644
--- a/Source/core/html/HTMLFrameElementBase.h
+++ b/Source/core/html/HTMLFrameElementBase.h
@@ -41,6 +41,9 @@ public:
 
     virtual bool canContainRangeEndPoint() const OVERRIDE FINAL { return false; }
 
+    const AtomicString& url() const { return m_URL; }
+    void setNameAndOpenURL();
+
 protected:
     HTMLFrameElementBase(const QualifiedName&, Document&);
 
@@ -62,7 +65,6 @@ private:
     virtual bool areAuthorShadowsAllowed() const OVERRIDE FINAL { return false; }
 
     void setLocation(const String&);
-    void setNameAndOpenURL();
     void openURL(bool lockBackForwardList = true);
 
     AtomicString m_URL;