Oilpan: fix build after r351269.

third_party/WebKit/Source/core/inspector/AsyncOperationMap.h

 // 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.
 
 #ifndef AsyncOperationMap_h
 #define AsyncOperationMap_h
 
 #include "core/inspector/v8/V8DebuggerAgent.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
@@ skipping 57 matching lines @@
     void remove(typename MapType::KeyPeekInType key)
     {
         ASSERT(m_debuggerAgent);
         int operationId = m_asyncOperations.take(key);
         if (operationId)
             m_debuggerAgent->traceAsyncOperationCompleted(operationId);
     }
 
     DEFINE_INLINE_TRACE()
     {
-        visitor->trace(m_debuggerAgent);
         visitor->trace(m_asyncOperations);
     }
 
 private:
-    RawPtrWillBeMember<V8DebuggerAgent> m_debuggerAgent;
+    V8DebuggerAgent* m_debuggerAgent;
     MapType m_asyncOperations;
 };
 
 } // namespace blink
 
 
 #endif // AsyncOperationMap_h