Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/fetch/DataConsumerTee.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/DataConsumerTee.h"
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/fetch/DataConsumerHandleUtil.h"
 #include "modules/fetch/FetchBlobDataConsumerHandle.h"
@@ skipping 307 matching lines @@
 private:
     DestinationHandle(PassRefPtr<DestinationContext::Proxy> contextProxy) : m_contextProxy(contextProxy) { }
     DestinationReader* obtainReaderInternal(Client* client) { return new DestinationReader(m_contextProxy, client); }
     const char* debugName() const override { return "DestinationHandle"; }
 
     RefPtr<DestinationContext::Proxy> m_contextProxy;
 };
 
 // Bound to the created thread.
 class SourceContext final : public GarbageCollectedFinalized<SourceContext>, public ActiveDOMObject, public WebDataConsumerHandle::Client {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SourceContext);
+    USING_GARBAGE_COLLECTED_MIXIN(SourceContext);
 public:
     SourceContext(
         PassRefPtr<TeeRootObject> root,
         PassOwnPtr<WebDataConsumerHandle> src,
         PassRefPtr<DestinationContext> dest1,
         PassRefPtr<DestinationContext> dest2,
         ExecutionContext* executionContext)
         : ActiveDOMObject(executionContext)
         , m_root(root)
         , m_reader(src->obtainReader(this))
@@ skipping 85 matching lines @@
     }
 
     OwnPtr<WebDataConsumerHandle> webDest1, webDest2;
     DataConsumerTee::create(executionContext, static_cast<PassOwnPtr<WebDataConsumerHandle>>(src), &webDest1, &webDest2);
     *dest1 = createFetchDataConsumerHandleFromWebHandle(webDest1.release());
     *dest2 = createFetchDataConsumerHandleFromWebHandle(webDest2.release());
     return;
 }
 
 } // namespace blink