MQParser memory leak fix

Source/core/css/CSSParserValuesTest.cpp

 /*
  * Copyright 2013, 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 74 matching lines @@
 }
 
 TEST(CSSParserValuesTest, CSSParserValuelistClear)
 {
     CSSParserValueList list;
     for (int i = 0; i < 3; ++i) {
         CSSParserValue value;
         value.setFromNumber(3);
         list.addValue(value);
     }
-    list.clear();
+    list.clearAndLeakValues();
     ASSERT_FALSE(list.size());
     ASSERT_FALSE(list.currentIndex());
 }
 
 } // namespace