Oilpan: fix build after r197958.

Source/modules/cachestorage/Cache.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/Cache.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 194 matching lines @@
         m_completed = true;
 
         ScriptState* state = m_resolver->scriptState();
         ScriptState::Scope scope(state);
         m_resolver->reject(V8ThrowException::createTypeError(state->isolate(), exception->toString()));
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_cache);
+        visitor->trace(m_resolver);
     }
 
 private:
     bool m_completed = false;
     int m_numberOfRemainingOperations;
     Member<Cache> m_cache;
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    RefPtrWillBeMember<ScriptPromiseResolver> m_resolver;
     Vector<WebServiceWorkerCache::BatchOperation> m_batchOperations;
 };
 
 class Cache::BlobHandleCallbackForPut final : public BodyStreamBuffer::BlobHandleCreatorClient {
 public:
     BlobHandleCallbackForPut(size_t index, BarrierCallbackForPut* barrierCallback, Request* request, Response* response)
         : m_index(index)
         , m_barrierCallback(barrierCallback)
     {
         request->populateWebServiceWorkerRequest(m_webRequest);
@@ skipping 247 matching lines @@
     m_webCache->dispatchKeys(new CacheWithRequestsCallbacks(resolver), 0, toWebQueryParams(options));
     return promise;
 }
 
 WebServiceWorkerCache* Cache::webCache() const
 {
     return m_webCache.get();
 }
 
 } // namespace blink