Add WebDocument::manifestURL().

public/web/WebDocument.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 125 matching lines @@
 
     // Arranges to call WebFrameClient::didMatchCSS(frame(), ...) when one of
     // the selectors matches or stops matching an element in this document.
     // Each call to this method overrides any previous calls.
     BLINK_EXPORT void watchCSSSelectors(const WebVector<WebString>& selectors);
 
     BLINK_EXPORT WebVector<WebDraggableRegion> draggableRegions() const;
 
     BLINK_EXPORT v8::Handle<v8::Value> registerEmbedderCustomElement(const WebString& name, v8::Handle<v8::Value> options, WebExceptionCode&);
 
+    BLINK_EXPORT WebURL manifestURL() const;
+
 #if BLINK_IMPLEMENTATION
     WebDocument(const PassRefPtrWillBeRawPtr<Document>&);
     WebDocument& operator=(const PassRefPtrWillBeRawPtr<Document>&);
     operator PassRefPtrWillBeRawPtr<Document>() const;
 #endif
 };
 
 } // namespace blink
 
 #endif