Oilpan: Forbid adoptRef(X*) where X is RefCountedGarbageCollected

Source/core/rendering/ClipRects.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ClipRects_h
 #define ClipRects_h
 
 #include "core/rendering/ClipRect.h"
+#include "wtf/RefCounted.h"
 
 namespace blink {
 
-class ClipRects {
+class ClipRects : public RefCounted<ClipRects> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassRefPtr<ClipRects> create()
     {
         return adoptRef(new ClipRects);
     }
 
     static PassRefPtr<ClipRects> create(const ClipRects& other)
     {
         return adoptRef(new ClipRects(other));
     }
 
     ClipRects()
-        : m_refCnt(1)
-        , m_fixed(0)
+        : m_fixed(0)
     {
     }
 
     void reset(const LayoutRect& r)
     {
         m_overflowClipRect = r;
         m_fixedClipRect = r;
         m_posClipRect = r;
         m_fixed = 0;
     }
 
     const ClipRect& overflowClipRect() const { return m_overflowClipRect; }
     void setOverflowClipRect(const ClipRect& r) { m_overflowClipRect = r; }
 
     const ClipRect& fixedClipRect() const { return m_fixedClipRect; }
     void setFixedClipRect(const ClipRect&r) { m_fixedClipRect = r; }
 
     const ClipRect& posClipRect() const { return m_posClipRect; }
     void setPosClipRect(const ClipRect& r) { m_posClipRect = r; }
 
     bool fixed() const { return static_cast<bool>(m_fixed); }
     void setFixed(bool fixed) { m_fixed = fixed ? 1 : 0; }
 
-    void ref() { m_refCnt++; }
-    void deref()
-    {
-        if (!--m_refCnt)
-            delete this;
-    }
-
     bool operator==(const ClipRects& other) const
     {
         return m_overflowClipRect == other.overflowClipRect()
             && m_fixedClipRect == other.fixedClipRect()
             && m_posClipRect == other.posClipRect()
             && fixed() == other.fixed();
     }
 
     ClipRects& operator=(const ClipRects& other)
     {
         m_overflowClipRect = other.overflowClipRect();
         m_fixedClipRect = other.fixedClipRect();
         m_posClipRect = other.posClipRect();
         m_fixed = other.fixed();
         return *this;
     }
 
 private:
     ClipRects(const LayoutRect& r)
         : m_overflowClipRect(r)
         , m_fixedClipRect(r)
         , m_posClipRect(r)
-        , m_refCnt(1)
         , m_fixed(0)
     {
     }
 
     ClipRects(const ClipRects& other)
         : m_overflowClipRect(other.overflowClipRect())
         , m_fixedClipRect(other.fixedClipRect())
         , m_posClipRect(other.posClipRect())
-        , m_refCnt(1)
         , m_fixed(other.fixed())
     {
     }
 
     ClipRect m_overflowClipRect;
     ClipRect m_fixedClipRect;
     ClipRect m_posClipRect;
-    unsigned m_refCnt : 31;
-    unsigned m_fixed : 1;
+    unsigned m_fixed;
 };
 
 } // namespace blink
 
 #endif // ClipRects_h