Add WebDocument::manifestURL().

BUG=410419

Review URL: https://codereview.chromium.org/535283003

git-svn-id: svn://svn.chromium.org/blink/trunk@181624 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/WebDocument.cpp

@@ -49,6 +49,7 @@
 #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"
@@ -336,6 +337,15 @@ v8::Handle<v8::Value> WebDocument::registerEmbedderCustomElement(const WebString
     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)
 {

third_party/WebKit/public/web/WebDocument.h

@@ -143,6 +143,8 @@ public:
 
     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>&);