Refactoring: Extract DocumentInit for capture Document construction parameter.

Source/core/html/HTMLViewSourceDocument.h

Index: Source/core/html/HTMLViewSourceDocument.h
diff --git a/Source/core/html/HTMLViewSourceDocument.h b/Source/core/html/HTMLViewSourceDocument.h
index 9e196c8f1b7d45f9d9361ba658b88373ddcf925d..45f870f0d31afed5c56b7398ac2ae22a96a35bfc 100644
--- a/Source/core/html/HTMLViewSourceDocument.h
+++ b/Source/core/html/HTMLViewSourceDocument.h
@@ -35,15 +35,15 @@ class HTMLToken;
 
 class HTMLViewSourceDocument FINAL : public HTMLDocument {
 public:
-    static PassRefPtr<HTMLViewSourceDocument> create(Frame* frame, const KURL& url, const String& mimeType)
+    static PassRefPtr<HTMLViewSourceDocument> create(const DocumentInit& initializer, const String& mimeType)
     {
-        return adoptRef(new HTMLViewSourceDocument(frame, url, mimeType));
+        return adoptRef(new HTMLViewSourceDocument(initializer, mimeType));
     }
 
     void addSource(const String&, HTMLToken&);
 
 private:
-    HTMLViewSourceDocument(Frame*, const KURL&, const String& mimeType);
+    HTMLViewSourceDocument(const DocumentInit&, const String& mimeType);
 
     virtual PassRefPtr<DocumentParser> createParser() OVERRIDE;