Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/platform/heap/PagePool.cpp

 // 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.
 
 #include "platform/heap/PagePool.h"
 
 #include "platform/heap/Heap.h"
 #include "platform/heap/PageMemory.h"
 #include "wtf/Assertions.h"
 
@@ skipping 108 matching lines @@
   for (Address current = address; current < address + size; ++current) {
     breakOptimization(current);
     *current = value;
   }
 }
 
 void OrphanedPagePool::clearMemory(PageMemory* memory) {
   asanDisabledMemset(memory->writableStart(), 0, blinkPagePayloadSize());
 }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
 bool OrphanedPagePool::contains(void* object) {
   for (int index = 0; index < BlinkGC::NumberOfArenas; ++index) {
     for (PoolEntry* entry = m_pool[index]; entry; entry = entry->next) {
       BasePage* page = entry->data;
       if (page->contains(reinterpret_cast<Address>(object)))
         return true;
     }
   }
   return false;
 }
 #endif
 
 }  // namespace blink