Oilpan: avoid using WeakPtr<> for heap residing objects.

Source/modules/cachestorage/CacheStorage.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/cachestorage/CacheStorage.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMException.h"
@@ skipping 185 matching lines @@
         if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped())
             return;
         m_resolver->reject(CacheStorageError::createException(reason));
         m_resolver.clear();
     }
 
 private:
     Persistent<ScriptPromiseResolver> m_resolver;
 };
 
-CacheStorage* CacheStorage::create(WeakPtr<GlobalFetch::ScopedFetcher> fetcher, WebServiceWorkerCacheStorage* webCacheStorage)
+CacheStorage* CacheStorage::create(WeakPtrWillBeRawPtr<GlobalFetch::ScopedFetcher> fetcher, WebServiceWorkerCacheStorage* webCacheStorage)
 {
     return new CacheStorage(fetcher, adoptPtr(webCacheStorage));
 }
 
 ScriptPromise CacheStorage::open(ScriptState* scriptState, const String& cacheName, ExceptionState& exceptionState)
 {
     if (!commonChecks(scriptState, exceptionState))
         return ScriptPromise();
 
     ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
@@ skipping 89 matching lines @@
     const ScriptPromise promise = resolver->promise();
 
     if (m_webCacheStorage)
         m_webCacheStorage->dispatchMatch(new MatchCallbacks(resolver), webRequest, Cache::toWebQueryParams(options));
     else
         resolver->reject(createNoImplementationException());
 
     return promise;
 }
 
-CacheStorage::CacheStorage(WeakPtr<GlobalFetch::ScopedFetcher> fetcher, PassOwnPtr<WebServiceWorkerCacheStorage> webCacheStorage)
+CacheStorage::CacheStorage(WeakPtrWillBeRawPtr<GlobalFetch::ScopedFetcher> fetcher, PassOwnPtr<WebServiceWorkerCacheStorage> webCacheStorage)
     : m_scopedFetcher(fetcher)
     , m_webCacheStorage(webCacheStorage)
 {
 }
 
 CacheStorage::~CacheStorage()
 {
 }
 
 void CacheStorage::dispose()
 {
     m_webCacheStorage.clear();
 }
 
 DEFINE_TRACE(CacheStorage)
 {
+    visitor->trace(m_scopedFetcher);
     visitor->trace(m_nameToCacheMap);
 }
 
 } // namespace blink