Move files in wtf/ to platform/wtf/ (Part 7).

third_party/WebKit/Source/wtf/PassRefPtr.h

Index: third_party/WebKit/Source/wtf/PassRefPtr.h
diff --git a/third_party/WebKit/Source/wtf/PassRefPtr.h b/third_party/WebKit/Source/wtf/PassRefPtr.h
index a65d7444071f35454f91d3d35965935a69918071..0623e52beee7e0526765cc019abea24e73e1821f 100644
--- a/third_party/WebKit/Source/wtf/PassRefPtr.h
+++ b/third_party/WebKit/Source/wtf/PassRefPtr.h
@@ -1,224 +1,9 @@
-/*
- *  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,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  Library General Public License for more details.
- *
- *  You should have received a copy of the GNU Library General Public License
- *  along with this library; see the file COPYING.LIB.  If not, write to
- *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- *  Boston, MA 02110-1301, USA.
- *
- */
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
-// PassRefPtr will soon be deleted.
-// New code should instead pass ownership of the contents of a RefPtr using
-// std::move().
+#include "platform/wtf/PassRefPtr.h"
 
-#ifndef WTF_PassRefPtr_h
-#define WTF_PassRefPtr_h
-
-#include "wtf/Allocator.h"
-#include "wtf/Assertions.h"
-#include "wtf/Compiler.h"
-#include "wtf/TypeTraits.h"
-
-namespace WTF {
-
-template <typename T>
-class RefPtr;
-template <typename T>
-class PassRefPtr;
-template <typename T>
-PassRefPtr<T> adoptRef(T*);
-
-inline void adopted(const void*) {}
-
-// requireAdoption() is not overloaded for WTF::RefCounted, which has a built-in
-// assumption that adoption is required. requireAdoption() is for bootstrapping
-// alternate reference count classes that are compatible with ReftPtr/PassRefPtr
-// but cannot have adoption checks enabled by default, such as skia's
-// SkRefCnt. The purpose of requireAdoption() is to enable adoption checks only
-// once it is known that the object will be used with RefPtr/PassRefPtr.
-inline void requireAdoption(const void*) {}
-
-template <typename T>
-ALWAYS_INLINE void refIfNotNull(T* ptr) {
-  if (LIKELY(ptr != 0)) {
-    requireAdoption(ptr);
-    ptr->ref();
-  }
-}
-
-template <typename T>
-ALWAYS_INLINE void derefIfNotNull(T* ptr) {
-  if (LIKELY(ptr != 0))
-    ptr->deref();
-}
-
-template <typename T>
-class PassRefPtr {
-  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
-
- public:
-  PassRefPtr() : m_ptr(nullptr) {}
-  PassRefPtr(std::nullptr_t) : m_ptr(nullptr) {}
-  PassRefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
-  PassRefPtr(PassRefPtr&& o) : m_ptr(o.leakRef()) {}
-  template <typename U>
-  PassRefPtr(const PassRefPtr<U>& o, EnsurePtrConvertibleArgDecl(U, T))
-      : m_ptr(o.leakRef()) {}
-
-  ALWAYS_INLINE ~PassRefPtr() { derefIfNotNull(m_ptr); }
-
-  template <typename U>
-  PassRefPtr(const RefPtr<U>&, EnsurePtrConvertibleArgDecl(U, T));
-  template <typename U>
-  PassRefPtr(RefPtr<U>&&, EnsurePtrConvertibleArgDecl(U, T));
-
-  T* get() const { return m_ptr; }
-
-  WARN_UNUSED_RESULT T* leakRef() const;
-
-  T& operator*() const { return *m_ptr; }
-  T* operator->() const { return m_ptr; }
-
-  bool operator!() const { return !m_ptr; }
-  explicit operator bool() const { return m_ptr != nullptr; }
-
-  friend PassRefPtr adoptRef<T>(T*);
-
- private:
-  enum AdoptRefTag { AdoptRef };
-  PassRefPtr(T* ptr, AdoptRefTag) : m_ptr(ptr) {}
-
-  PassRefPtr& operator=(const PassRefPtr&) {
-    static_assert(!sizeof(T*), "PassRefPtr should never be assigned to");
-    return *this;
-  }
-
-  mutable T* m_ptr;
-};
-
-template <typename T>
-PassRefPtr<T> wrapPassRefPtr(T* ptr) {
-  return PassRefPtr<T>(ptr);
-}
-
-template <typename T>
-template <typename U>
-inline PassRefPtr<T>::PassRefPtr(const RefPtr<U>& o,
-                                 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.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) {
-  return a.get() == b.get();
-}
-
-template <typename T, typename U>
-inline bool operator==(const PassRefPtr<T>& a, const RefPtr<U>& b) {
-  return a.get() == b.get();
-}
-
-template <typename T, typename U>
-inline bool operator==(const RefPtr<T>& a, const PassRefPtr<U>& b) {
-  return a.get() == b.get();
-}
-
-template <typename T, typename U>
-inline bool operator==(const PassRefPtr<T>& a, U* b) {
-  return a.get() == b;
-}
-
-template <typename T, typename U>
-inline bool operator==(T* a, const PassRefPtr<U>& b) {
-  return a == b.get();
-}
-
-template <typename T>
-inline bool operator==(const PassRefPtr<T>& a, std::nullptr_t) {
-  return !a.get();
-}
-
-template <typename T>
-inline bool operator==(std::nullptr_t, const PassRefPtr<T>& b) {
-  return !b.get();
-}
-
-template <typename T, typename U>
-inline bool operator!=(const PassRefPtr<T>& a, const PassRefPtr<U>& b) {
-  return a.get() != b.get();
-}
-
-template <typename T, typename U>
-inline bool operator!=(const PassRefPtr<T>& a, const RefPtr<U>& b) {
-  return a.get() != b.get();
-}
-
-template <typename T, typename U>
-inline bool operator!=(const RefPtr<T>& a, const PassRefPtr<U>& b) {
-  return a.get() != b.get();
-}
-
-template <typename T, typename U>
-inline bool operator!=(const PassRefPtr<T>& a, U* b) {
-  return a.get() != b;
-}
-
-template <typename T, typename U>
-inline bool operator!=(T* a, const PassRefPtr<U>& b) {
-  return a != b.get();
-}
-
-template <typename T>
-inline bool operator!=(const PassRefPtr<T>& a, std::nullptr_t) {
-  return a.get();
-}
-
-template <typename T>
-inline bool operator!=(std::nullptr_t, const PassRefPtr<T>& b) {
-  return b.get();
-}
-
-template <typename T>
-PassRefPtr<T> adoptRef(T* p) {
-  adopted(p);
-  return PassRefPtr<T>(p, PassRefPtr<T>::AdoptRef);
-}
-
-template <typename T>
-inline T* getPtr(const PassRefPtr<T>& p) {
-  return p.get();
-}
-
-}  // namespace WTF
-
-using WTF::PassRefPtr;
-using WTF::adoptRef;
-
-#endif  // WTF_PassRefPtr_h
+// The contents of this header was moved to platform/wtf as part of
+// WTF migration project. See the following post for details:
+// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ