Remove calls to deprecated toWebCoreStringWithNullCheck(v8::Handle<v8::Value>)

Source/bindings/v8/ScriptValue.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 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 91 matching lines @@
         v8::Local<v8::Array> propertyNames = object->GetPropertyNames();
         uint32_t length = propertyNames->Length();
         for (uint32_t i = 0; i < length; i++) {
             v8::Local<v8::Value> name = propertyNames->Get(v8::Int32::New(i, isolate));
             // FIXME(yurys): v8::Object should support GetOwnPropertyNames
             if (name->IsString() && !object->HasRealNamedProperty(v8::Handle<v8::String>::Cast(name)))
                 continue;
             RefPtr<JSONValue> propertyValue = v8ToJSONValue(object->Get(name), maxDepth, isolate);
             if (!propertyValue)
                 return 0;
-            jsonObject->setValue(toWebCoreStringWithNullCheck(name), propertyValue);
+            V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<WithNullCheck>, nameString, name, 0);
+            jsonObject->setValue(nameString, propertyValue);
         }
         return jsonObject;
     }
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 PassRefPtr<JSONValue> ScriptValue::toJSONValue(ScriptState* scriptState) const
 {
     v8::HandleScope handleScope(scriptState->isolate());
     // v8::Object::GetPropertyNames() expects current context to be not null.
     v8::Context::Scope contextScope(scriptState->context());
     return v8ToJSONValue(v8Value(), JSONValue::maxDepth, scriptState->isolate());
 }
 
 } // namespace WebCore