Rewrite references to "wtf/" to "platform/wtf/" in platform/heap.

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

 // Copyright 2016 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.
 
 #ifndef Persistent_h
 #define Persistent_h
 
 #include "platform/heap/Heap.h"
 #include "platform/heap/Member.h"
 #include "platform/heap/PersistentNode.h"
 #include "platform/heap/Visitor.h"
-#include "wtf/Allocator.h"
-#include "wtf/Atomics.h"
+#include "platform/wtf/Allocator.h"
+#include "platform/wtf/Atomics.h"
 
 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<>.)
 #define IS_PERSISTENT_REFERENCE_TYPE()         \
  public:                                       \
   using IsPersistentReferenceTypeMarker = int; \
                                                \
@@ skipping 779 matching lines @@
   static blink::CrossThreadPersistent<T> Unwrap(
       const blink::CrossThreadWeakPersistent<T>& wrapped) {
     blink::CrossThreadPersistentRegion::LockScope persistentLock(
         blink::ProcessHeap::crossThreadPersistentRegion());
     return blink::CrossThreadPersistent<T>(wrapped.get());
   }
 };
 }
 
 #endif  // Persistent_h