Remove OwnPtr::release() calls in core/ (part 4).

third_party/WebKit/Source/core/style/CounterDirectives.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 19 matching lines @@
     return a.isIncrement() == b.isIncrement()
         && a.incrementValue() == b.incrementValue()
         && a.isReset() == b.isReset()
         && a.resetValue() == b.resetValue();
 }
 
 PassOwnPtr<CounterDirectiveMap> clone(const CounterDirectiveMap& counterDirectives)
 {
     OwnPtr<CounterDirectiveMap> result = adoptPtr(new CounterDirectiveMap);
     *result = counterDirectives;
-    return result.release();
+    return result;
 }
 
 } // namespace blink