Move CrossThreadCopier from platform/ to wtf/

third_party/WebKit/Source/wtf/Functional.h

 /*
  * Copyright (C) 2011 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
@@ skipping 12 matching lines @@
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WTF_Functional_h
 #define WTF_Functional_h
 
 #include "base/bind.h"
 #include "base/threading/thread_checker.h"
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
+#include "wtf/CrossThreadCopier.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/RefPtr.h"
 #include "wtf/ThreadSafeRefCounted.h"
 #include "wtf/TypeTraits.h"
 #include "wtf/WeakPtr.h"
 #include <utility>
 
 namespace blink {
 template <typename T> class Member;
@@ skipping 80 matching lines @@
 
 template <typename T>
 PassedWrapper<T> passed(T&& value)
 {
     static_assert(!std::is_reference<T>::value,
         "You must pass an rvalue to passed() so it can be moved. Add std::move() if necessary.");
     static_assert(!std::is_const<T>::value, "|value| must not be const so it can be moved.");
     return PassedWrapper<T>(std::move(value));
 }
 
+template <typename T>
+struct CrossThreadCopier<PassedWrapper<T>> {
+    STATIC_ONLY(CrossThreadCopier);
+    using Type = PassedWrapper<typename CrossThreadCopier<T>::Type>;
+    static Type copy(PassedWrapper<T>&& value) { return passed(CrossThreadCopier<T>::copy(value.moveOut())); }
+};
+
 template <typename T, FunctionThreadAffinity threadAffinity>
 class UnretainedWrapper final {
 public:
     explicit UnretainedWrapper(T* ptr) : m_ptr(ptr) { }
     T* value() const { return m_ptr; }
 
 private:
     T* m_ptr;
 };
 
 template <typename T>
 UnretainedWrapper<T, SameThreadAffinity> unretained(T* value)
 {
     static_assert(!WTF::IsGarbageCollectedType<T>::value, "unretained() + GCed type is forbidden");
     return UnretainedWrapper<T, SameThreadAffinity>(value);
 }
 
 template <typename T>
 UnretainedWrapper<T, CrossThreadAffinity> crossThreadUnretained(T* value)
 {
     static_assert(!WTF::IsGarbageCollectedType<T>::value, "crossThreadUnretained() + GCed type is forbidden");
     return UnretainedWrapper<T, CrossThreadAffinity>(value);
 }
 
+template<typename T>
+struct CrossThreadCopier<UnretainedWrapper<T, CrossThreadAffinity>> : public CrossThreadCopierPassThrough<UnretainedWrapper<T, CrossThreadAffinity>> {
+    STATIC_ONLY(CrossThreadCopier);
+};
+
 template <typename T>
 struct ParamStorageTraits {
     typedef T StorageType;
 
     static_assert(!std::is_pointer<T>::value, "Raw pointers are not allowed to bind into WTF::Function. Wrap it with either wrapPersistent, wrapWeakPersistent, wrapCrossThreadPersistent, wrapCrossThreadWeakPersistent, RefPtr or unretained.");
     static_assert(!IsSubclassOfTemplate<T, blink::Member>::value && !IsSubclassOfTemplate<T, blink::WeakMember>::value, "Member and WeakMember are not allowed to bind into WTF::Function. Wrap it with either wrapPersistent, wrapWeakPersistent, wrapCrossThreadPersistent or wrapCrossThreadWeakPersistent.");
 };
 
 template <typename T>
 struct ParamStorageTraits<PassRefPtr<T>> {
@@ skipping 95 matching lines @@
 } // namespace WTF
 
 using WTF::passed;
 using WTF::unretained;
 using WTF::crossThreadUnretained;
 
 using WTF::Function;
 using WTF::CrossThreadClosure;
 
 #endif // WTF_Functional_h