Oilpan: Remove raw pointer to InProcessWorkerBase from WorkerMessagingProxy

Source/core/workers/WorkerMessagingProxy.h

Index: Source/core/workers/WorkerMessagingProxy.h
diff --git a/Source/core/workers/WorkerMessagingProxy.h b/Source/core/workers/WorkerMessagingProxy.h
index c0fab0dd5b659a191015951a4128bacb8585307f..82c5fb4948e444d13f613504714d3e0bc31db87f 100644
--- a/Source/core/workers/WorkerMessagingProxy.h
+++ b/Source/core/workers/WorkerMessagingProxy.h
@@ -52,6 +52,8 @@ class CORE_EXPORT WorkerMessagingProxy
     , private WorkerLoaderProxyProvider {
     WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy);
 public:
+    DECLARE_VIRTUAL_TRACE();
+
     // Implementations of WorkerGlobalScopeProxy.
     // (Only use these methods in the worker object thread.)
     void startWorkerGlobalScope(const KURL& scriptURL, const String& userAgent, const String& sourceCode, WorkerThreadStartMode) override;
@@ -75,6 +77,8 @@ public:
 
     void workerThreadCreated(PassRefPtr<WorkerThread>);
 
+    void clearWeakMembers(Visitor*);
+
 protected:
     WorkerMessagingProxy(InProcessWorkerBase*, PassOwnPtrWillBeRawPtr<WorkerClients>);
     ~WorkerMessagingProxy() override;
@@ -94,9 +98,9 @@ private:
     void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) override;
     bool postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask>) override;
 
-    RefPtrWillBePersistent<ExecutionContext> m_executionContext;
+    RefPtrWillBeMember<ExecutionContext> m_executionContext;
     OwnPtr<WorkerObjectProxy> m_workerObjectProxy;
-    InProcessWorkerBase* m_workerObject;
+    RawPtrWillBeWeakMember<InProcessWorkerBase> m_workerObject;
     bool m_mayBeDestroyed;
     RefPtr<WorkerThread> m_workerThread;
 
@@ -108,9 +112,14 @@ private:
     Vector<OwnPtr<ExecutionContextTask>> m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
     OwnPtr<WorkerInspectorProxy> m_workerInspectorProxy;
 
-    OwnPtrWillBePersistent<WorkerClients> m_workerClients;
+    OwnPtrWillBeMember<WorkerClients> m_workerClients;
 
     RefPtr<WorkerLoaderProxy> m_loaderProxy;
+
+#if ENABLE(OILPAN)
+    GC_PLUGIN_IGNORE("366546")
+    OwnPtr<Persistent<WorkerMessagingProxy>> m_keepAlive;

[haraken, 2015/07/30 11:46:31]

Once https://codereview.chromium.org/1233173002/ is landed, we can use the
SelfKeepAlive handle.

+#endif
 };
 
 } // namespace blink