Oilpan: Enable oilpan for callback classes

Source/core/dom/StringCallback.cpp

Index: Source/core/dom/StringCallback.cpp
diff --git a/Source/core/dom/StringCallback.cpp b/Source/core/dom/StringCallback.cpp
index 0718182e15d79502c09b22d576be31c4bcc8e1cc..7a95cee49cf19145f05705135a14ee3fef46384a 100644
--- a/Source/core/dom/StringCallback.cpp
+++ b/Source/core/dom/StringCallback.cpp
@@ -41,7 +41,7 @@ namespace {
 
 class DispatchCallbackTask FINAL : public ExecutionContextTask {
 public:
-    static PassOwnPtr<DispatchCallbackTask> create(PassOwnPtrWillBeRawPtr<StringCallback> callback, const String& data, const String& taskName)
+    static PassOwnPtr<DispatchCallbackTask> create(StringCallback* callback, const String& data, const String& taskName)
     {
         return adoptPtr(new DispatchCallbackTask(callback, data, taskName));
     }
@@ -57,21 +57,21 @@ public:
     }
 
 private:
-    DispatchCallbackTask(PassOwnPtrWillBeRawPtr<StringCallback> callback, const String& data, const String& taskName)
+    DispatchCallbackTask(StringCallback* callback, const String& data, const String& taskName)
         : m_callback(callback)
         , m_data(data)
         , m_taskName(taskName)
     {
     }
 
-    OwnPtrWillBePersistent<StringCallback> m_callback;
+    Persistent<StringCallback> m_callback;
     const String m_data;
     const String m_taskName;
 };
 
 } // namespace
 
-void StringCallback::scheduleCallback(PassOwnPtrWillBeRawPtr<StringCallback> callback, ExecutionContext* context, const String& data, const String& instrumentationName)
+void StringCallback::scheduleCallback(StringCallback* callback, ExecutionContext* context, const String& data, const String& instrumentationName)
 {
     context->postTask(DispatchCallbackTask::create(callback, data, instrumentationName));
 }