Use enum for per thread heap enabled flag

third_party/WebKit/Source/modules/fetch/DataConsumerHandleTestUtil.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 "modules/fetch/DataConsumerHandleTestUtil.h"
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
 
 namespace blink {
 
 DataConsumerHandleTestUtil::Thread::Thread(const char* name, InitializationPolicy initializationPolicy)
-    : m_thread(WebThreadSupportingGC::create(name))
+    : m_thread(WebThreadSupportingGC::create(name, BlinkGC::MainThreadHeapMode))
     , m_initializationPolicy(initializationPolicy)
     , m_waitableEvent(wrapUnique(new WaitableEvent()))
 {
     m_thread->postTask(BLINK_FROM_HERE, crossThreadBind(&Thread::initialize, crossThreadUnretained(this)));
     m_waitableEvent->wait();
 }
 
 DataConsumerHandleTestUtil::Thread::~Thread()
 {
     m_thread->postTask(BLINK_FROM_HERE, crossThreadBind(&Thread::shutdown, crossThreadUnretained(this)));
@@ skipping 267 matching lines @@
 }
 
 void DataConsumerHandleTestUtil::HandleTwoPhaseReader::runOnFinishedReading(std::unique_ptr<HandleReadResult> result)
 {
     DCHECK(m_onFinishedReading);
     std::unique_ptr<OnFinishedReading> onFinishedReading(std::move(m_onFinishedReading));
     (*onFinishedReading)(std::move(result));
 }
 
 } // namespace blink