Remove dead code in ScriptArguments.

Source/core/inspector/ScriptArguments.cpp

 /*
  * Copyright (c) 2010 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 163 matching lines @@
 {
     m_arguments.swap(arguments);
 }
 
 const ScriptValue &ScriptArguments::argumentAt(size_t index) const
 {
     ASSERT(m_arguments.size() > index);
     return m_arguments[index];
 }
 
-bool ScriptArguments::getFirstArgumentAsString(String& result, bool checkForNullOrUndefined)
+bool ScriptArguments::getFirstArgumentAsString(String& result) const
 {
     if (!argumentCount())
         return false;
 
     const ScriptValue& value = argumentAt(0);
     ScriptState::Scope scope(m_scriptState.get());
-    if (checkForNullOrUndefined && (value.isNull() || value.isUndefined()))
-        return false;
-
     result = V8ValueStringBuilder::toString(value.v8Value(), value.isolate());
     return true;
 }
 
 } // namespace blink