Oilpan: remove GlobalFetch GC plugin ignorance.

Source/modules/fetch/GlobalFetch.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 "config.h"
 #include "modules/fetch/GlobalFetch.h"
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/UseCounter.h"
@@ skipping 65 matching lines @@
     private:
         StopDetector(ExecutionContext* executionContext, FetchManager* fetchManager)
             : ActiveDOMObject(executionContext)
             , m_fetchManager(fetchManager)
         {
             suspendIfNeeded();
         }
 
         // Having a raw pointer is safe, because |m_fetchManager| is owned by
         // the owner of this object.
-        GC_PLUGIN_IGNORE("crbug.com/444740") RawPtrWillBeMember<FetchManager> m_fetchManager;
+        RawPtrWillBeMember<FetchManager> m_fetchManager;
     };
 
     explicit GlobalFetchImpl(ExecutionContext* executionContext)
         : m_fetchManager(FetchManager::create(executionContext))
         , m_stopDetector(StopDetector::create(executionContext, m_fetchManager.get()))
     {
     }
     static const char* name() { return "GlobalFetch"; }
 
     OwnPtrWillBeMember<FetchManager> m_fetchManager;
     OwnPtrWillBeMember<StopDetector> m_stopDetector;
 };
 
 } // namespace
 
 ScriptPromise GlobalFetch::fetch(ScriptState* scriptState, DOMWindow& window, const RequestInfo& input, const Dictionary& init, ExceptionState& exceptionState)
 {
     UseCounter::count(window.executionContext(), UseCounter::Fetch);
     return GlobalFetchImpl<LocalDOMWindow>::from(toLocalDOMWindow(window), window.executionContext()).fetch(scriptState, input, init, exceptionState);
 }
 
 ScriptPromise GlobalFetch::fetch(ScriptState* scriptState, WorkerGlobalScope& worker, const RequestInfo& input, const Dictionary& init, ExceptionState& exceptionState)
 {
     // Note that UseCounter doesn't work with SharedWorker or ServiceWorker.
     UseCounter::count(worker.executionContext(), UseCounter::Fetch);
     return GlobalFetchImpl<WorkerGlobalScope>::from(worker, worker.executionContext()).fetch(scriptState, input, init, exceptionState);
 }
 
 } // namespace blink