Add WebDocument::manifestURL().

Source/web/WebDocument.cpp

 /*
  * 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 31 matching lines @@
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
 #include "core/dom/Fullscreen.h"
 #include "core/dom/StyleEngine.h"
 #include "core/html/HTMLAllCollection.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLHeadElement.h"
+#include "core/html/HTMLLinkElement.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderView.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/WebURL.h"
 #include "public/web/WebAXObject.h"
 #include "public/web/WebDOMEvent.h"
 #include "public/web/WebDocumentType.h"
 #include "public/web/WebElement.h"
 #include "public/web/WebElementCollection.h"
@@ skipping 267 matching lines @@
     Document* document = unwrap<Document>();
     Dictionary dictionary(options, isolate);
     TrackExceptionState exceptionState;
     ScriptValue constructor = document->registerElement(ScriptState::current(isolate), name, dictionary, exceptionState, CustomElement::EmbedderNames);
     ec = exceptionState.code();
     if (exceptionState.hadException())
         return v8::Handle<v8::Value>();
     return constructor.v8Value();
 }
 
+WebURL WebDocument::manifestURL() const
+{
+    const Document* document = constUnwrap<Document>();
+    HTMLLinkElement* linkElement = document->linkManifest();
+    if (!linkElement)
+        return WebURL();
+    return linkElement->href();
+}
+
 WebDocument::WebDocument(const PassRefPtrWillBeRawPtr<Document>& elem)
     : WebNode(elem)
 {
 }
 
 WebDocument& WebDocument::operator=(const PassRefPtrWillBeRawPtr<Document>& elem)
 {
     m_private = elem;
     return *this;
 }
 
 WebDocument::operator PassRefPtrWillBeRawPtr<Document>() const
 {
     return toDocument(m_private.get());
 }
 
 } // namespace blink