Add support for [PutForwards] IDL extended attribute

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index c35e4518e639daa0a92e8544561b85c310d43567..ab46d367807f87c83f6ef9d84a9eda3873c6ae2a 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -120,6 +120,7 @@ class LayoutPoint;
 class LayoutRect;
 class LiveNodeListBase;
 class Locale;
+class Location;
 class MediaQueryList;
 class MediaQueryMatcher;
 class MouseEventWithHitTestResults;
@@ -311,6 +312,8 @@ public:
 
     bool hasManifest() const;
 
+    Location* location() const;
+
     PassRefPtr<Element> createElement(const AtomicString& name, ExceptionState&);
     PassRefPtr<DocumentFragment> createDocumentFragment();
     PassRefPtr<Text> createTextNode(const String& data);