Remove incorrect deriving of CppVariant from WebNonCopyable.

Source/testing/runner/CppVariant.h

 /*
  * 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 24 matching lines @@
   CppVariant exists primarily as an interface between C++ callers and the
   corresponding NPVariant type.  CppVariant also provides a number of
   convenience constructors and accessors, so that the NPVariantType values
   don't need to be exposed, and a destructor to free any memory allocated for
   string values.
 */
 
 #ifndef CppVariant_h
 #define CppVariant_h
 
-#include "public/platform/WebNonCopyable.h"
 #include "public/web/WebBindings.h"
 #include <string>
 #include <vector>
 
 namespace WebTestRunner {
 
-class CppVariant : public NPVariant, public WebKit::WebNonCopyable {
+class CppVariant : public NPVariant {
 public:
     CppVariant();
     ~CppVariant();
     void setNull();
     void set(bool);
     void set(int32_t);
     void set(double);
 
     // Note that setting a CppVariant to a string value involves copying the
     // string data, which must be freed with a call to freeData() when the
@@ skipping 73 matching lines @@
     // invoked. Returns whether the method was successfully invoked. If the
     // method was invoked successfully, any return value is stored in the
     // CppVariant specified by result.
     bool invokeDefault(const CppVariant* arguments,
                        uint32_t argumentCount, CppVariant& result) const;
 };
 
 }
 
 #endif // CppVariant_h