Adds RefPtr::leakRef method to allow raw pointers that prevent destruct.

third_party/WebKit/Source/wtf/PassRefPtr.h

 /*
  *  Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 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 108 matching lines @@
                                  EnsurePtrConvertibleArgDefn(U, T))
     : m_ptr(o.get()) {
   T* ptr = m_ptr;
   refIfNotNull(ptr);
 }
 
 template <typename T>
 template <typename U>
 inline PassRefPtr<T>::PassRefPtr(RefPtr<U>&& o,
                                  EnsurePtrConvertibleArgDefn(U, T))
-    : m_ptr(o.release().leakRef()) {}
+    : m_ptr(o.leakRef()) {}
 
 template <typename T>
 inline T* PassRefPtr<T>::leakRef() const {
   T* ptr = m_ptr;
   m_ptr = nullptr;
   return ptr;
 }
 
 template <typename T, typename U>
 inline bool operator==(const PassRefPtr<T>& a, const PassRefPtr<U>& b) {
@@ skipping 75 matching lines @@
 inline T* getPtr(const PassRefPtr<T>& p) {
   return p.get();
 }
 
 }  // namespace WTF
 
 using WTF::PassRefPtr;
 using WTF::adoptRef;
 
 #endif  // WTF_PassRefPtr_h