Make ifdefs consistent in WebKit/Source/platform

third_party/WebKit/Source/platform/WebThreadSupportingGC.cpp

 // Copyright 2014 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/WebThreadSupportingGC.h"
 
 #include "platform/heap/SafePoint.h"
 #include "public/platform/WebScheduler.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/Threading.h"
@@ skipping 11 matching lines @@
     WebThread* thread,
     BlinkGC::ThreadHeapMode threadHeapMode) {
   return wrapUnique(new WebThreadSupportingGC(nullptr, thread, threadHeapMode));
 }
 
 WebThreadSupportingGC::WebThreadSupportingGC(
     const char* name,
     WebThread* thread,
     BlinkGC::ThreadHeapMode threadHeapMode)
     : m_thread(thread), m_threadHeapMode(threadHeapMode) {
-#if ENABLE(ASSERT)
-  ASSERT(!name || !thread);
+  DCHECK(!name || !thread);
+#if DCHECK_IS_ON()
   // We call this regardless of whether an existing thread is given or not,
   // as it means that blink is going to run with more than one thread.
   WTF::willCreateThread();
 #endif
   if (!m_thread) {
     // If |thread| is not given, create a new one and own it.
     m_owningThread = wrapUnique(Platform::current()->createThread(name));
     m_thread = m_owningThread.get();
   }
 }
@@ skipping 20 matching lines @@
 
   // Shutdown the thread (via its scheduler) only when the thread is created
   // and is owned by this instance.
   if (m_owningThread)
     m_owningThread->scheduler()->shutdown();
 
   ThreadState::detachCurrentThread();
 }
 
 }  // namespace blink