Replace ENABLE(ASSERT) with DCHECK_IS_ON().

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

 // Copyright 2015 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 MarkingVisitor_h
 #define MarkingVisitor_h
 
 #include "platform/heap/MarkingVisitorImpl.h"
 
 namespace blink {
@@ skipping 23 matching lines @@
                            WeakCallback callback) override {
     Impl::registerWeakMembers(closure, objectPointer, callback);
   }
 
   virtual void registerWeakTable(const void* closure,
                                  EphemeronCallback iterationCallback,
                                  EphemeronCallback iterationDoneCallback) {
     Impl::registerWeakTable(closure, iterationCallback, iterationDoneCallback);
   }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   virtual bool weakTableRegistered(const void* closure) {
     return Impl::weakTableRegistered(closure);
   }
 #endif
 
   void registerMovingObjectReference(MovableReference* slot) override {
     Impl::registerMovingObjectReference(slot);
   }
 
   void registerMovingObjectCallback(MovableReference backingStore,
                                     MovingObjectCallback callback,
                                     void* callbackData) override {
     Impl::registerMovingObjectCallback(backingStore, callback, callbackData);
   }
 
   bool ensureMarked(const void* objectPointer) override {
     return Impl::ensureMarked(objectPointer);
   }
 
   void registerWeakCellWithCallback(void** cell,
                                     WeakCallback callback) override {
     Impl::registerWeakCellWithCallback(cell, callback);
   }
 };
 
 }  // namespace blink
 
 #endif