Refactoring: Extract DocumentInit for capture Document construction parameter.

Source/core/html/TextDocument.cpp

Index: Source/core/html/TextDocument.cpp
diff --git a/Source/core/html/TextDocument.cpp b/Source/core/html/TextDocument.cpp
index 83caa017fef7f33242d7eb37120ed97837b56c04..8391f00a23188e970bbb67420fb9281eb7c2b99f 100644
--- a/Source/core/html/TextDocument.cpp
+++ b/Source/core/html/TextDocument.cpp
@@ -29,8 +29,8 @@
 
 namespace WebCore {
 
-TextDocument::TextDocument(Frame* frame, const KURL& url)
-    : HTMLDocument(frame, url)
+TextDocument::TextDocument(const DocumentInitializer& initializer)
+    : HTMLDocument(initializer)
 {
     setCompatibilityMode(QuirksMode);
     lockCompatibilityMode();