Unify and provide one IsGarbageCollectedType<T> implementation.

third_party/WebKit/Source/platform/heap/Handle.h

 /*
  * Copyright (C) 2014 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "platform/heap/Heap.h"
 #include "platform/heap/HeapAllocator.h"
 #include "platform/heap/InlinedGlobalMarkingVisitor.h"
 #include "platform/heap/PersistentNode.h"
 #include "platform/heap/ThreadState.h"
 #include "platform/heap/TraceTraits.h"
 #include "platform/heap/Visitor.h"
 #include "wtf/Allocator.h"
 #include "wtf/Atomics.h"
 #include "wtf/HashFunctions.h"
-#include "wtf/TypeTraits.h"
 
 #if defined(LEAK_SANITIZER)
 #include "wtf/LeakAnnotations.h"
 #endif
 
 namespace blink {
 
 // Marker used to annotate persistent objects and collections with,
 // so as to enable reliable testing for persistent references via
 // a type trait (see TypeTraits.h's IsPersistentReferenceType<>.)
@@ skipping 1097 matching lines @@
     STATIC_ONLY(NeedsTracing);
     static const bool value = true;
 };
 
 template<typename T>
 struct IsWeak<blink::WeakMember<T>> {
     STATIC_ONLY(IsWeak);
     static const bool value = true;
 };
 
-// For wtf/Functional.h
-template<typename T, bool isGarbageCollected> struct PointerParamStorageTraits;
-
-// The condition of 'T must be fully defined' (except for void) is checked in
-// blink::IsGarbageCollectedType<T>::value.
-template<typename T>
-struct PointerParamStorageTraits<T*, false> {
-    STATIC_ONLY(PointerParamStorageTraits);
-    using StorageType = T*;
-
-    static StorageType wrap(T* value) { return value; }
-    static T* unwrap(const StorageType& value) { return value; }
-};
-
-template<typename T>
-struct PointerParamStorageTraits<T*, true> {
-    STATIC_ONLY(PointerParamStorageTraits);
-    using StorageType = blink::CrossThreadPersistent<T>;
-
-    static StorageType wrap(T* value) { return value; }
-    static T* unwrap(const StorageType& value) { return value.get(); }
-};
-
-template<typename T>
-struct ParamStorageTraits<T*> : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
-    STATIC_ONLY(ParamStorageTraits);
-};
-
 template<typename T>
 struct ParamStorageTraits<blink::WeakPersistentThisPointer<T>> {
     STATIC_ONLY(ParamStorageTraits);
     static_assert(sizeof(T), "T must be fully defined");
     using StorageType = blink::WeakPersistent<T>;
 
     static StorageType wrap(const blink::WeakPersistentThisPointer<T>& value) { return value.value(); }
 
     // WTF::FunctionWrapper<> handles WeakPtr<>, so recast this weak persistent
     // into it.
@@ skipping 15 matching lines @@
     // into it.
     //
     // TODO(sof): remove this hack once wtf/Functional.h can also work with a type like
     // CrossThreadWeakPersistent<>.
     static WeakPtr<T> unwrap(const StorageType& value) { return WeakPtr<T>(WeakReference<T>::create(value.get())); }
 };
 
 } // namespace WTF
 
 #endif