Reduce platform/heap/ wtf includes.

Source/platform/heap/Heap.h

 /*
  * Copyright (C) 2013 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 21 matching lines @@
 #define Heap_h
 
 #include "platform/PlatformExport.h"
 #include "platform/heap/AddressSanitizer.h"
 #include "platform/heap/ThreadState.h"
 #include "platform/heap/Visitor.h"
 #include "public/platform/WebThread.h"
 #include "wtf/Assertions.h"
 #include "wtf/Atomics.h"
 #include "wtf/ContainerAnnotations.h"
+#include "wtf/Forward.h"
 #include "wtf/HashCountedSet.h"
 #include "wtf/LinkedHashSet.h"
 #include "wtf/ListHashSet.h"
-#include "wtf/OwnPtr.h"
 #include "wtf/PageAllocator.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/ThreadSafeRefCounted.h"
 #include <stdint.h>
 
 namespace blink {
 
 const size_t blinkPageSizeLog2 = 17;
 const size_t blinkPageSize = 1 << blinkPageSizeLog2;
 const size_t blinkPageOffsetMask = blinkPageSize - 1;
 const size_t blinkPageBaseMask = ~blinkPageOffsetMask;
 
 // We allocate pages at random addresses but in groups of
@@ skipping 2509 matching lines @@
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapVector<T, inlineCapacity>> : public GCInfoTrait<Vector<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapDeque<T, inlineCapacity>> : public GCInfoTrait<Deque<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, typename U, typename V>
 struct GCInfoTrait<HeapHashCountedSet<T, U, V>> : public GCInfoTrait<HashCountedSet<T, U, V, HeapAllocator>> { };
 
 } // namespace blink
 
 #endif // Heap_h