XMLHttpRequest#responseText should use a rope

Source/core/inspector/InspectorConsoleAgent.h

Index: Source/core/inspector/InspectorConsoleAgent.h
diff --git a/Source/core/inspector/InspectorConsoleAgent.h b/Source/core/inspector/InspectorConsoleAgent.h
index 5baa721add2b63943fca5e0ead475ee45bdea54f..550d2951044e323afdf7107a99677d704424c5f9 100644
--- a/Source/core/inspector/InspectorConsoleAgent.h
+++ b/Source/core/inspector/InspectorConsoleAgent.h
@@ -25,9 +25,9 @@
 #ifndef InspectorConsoleAgent_h
 #define InspectorConsoleAgent_h
 
-
 #include "InspectorFrontend.h"
 #include "bindings/v8/ScriptState.h"
+#include "bindings/v8/ScriptString.h"
 #include "core/inspector/ConsoleAPITypes.h"
 #include "core/inspector/InspectorBaseAgent.h"
 #include "core/page/ConsoleTypes.h"
@@ -88,7 +88,7 @@ public:
     void frameWindowDiscarded(DOMWindow*);
     void didCommitLoad(Frame*, DocumentLoader*);
 
-    void didFinishXHRLoading(ThreadableLoaderClient*, unsigned long requestIdentifier, const String&, const String& url, const String& sendURL, unsigned sendLineNumber);
+    void didFinishXHRLoading(ThreadableLoaderClient*, unsigned long requestIdentifier, ScriptString, const String& url, const String& sendURL, unsigned sendLineNumber);
     void didReceiveResourceResponse(unsigned long requestIdentifier, DocumentLoader*, const ResourceResponse& response, ResourceLoader*);
     void didFailLoading(unsigned long requestIdentifier, DocumentLoader*, const ResourceError&);
     void addProfileFinishedMessageToConsole(PassRefPtr<ScriptProfile>, unsigned lineNumber, const String& sourceURL);