Oilpan: fix build after r191713 (4c9f53fdbb).

Source/bindings/core/v8/V8PerIsolateData.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 96 matching lines @@
     void setPreviousSamplingState(const char* name) { m_previousSamplingState = name; }
 
     // EndOfScopeTasks are run by V8RecursionScope when control is returning
     // to C++ from script, after executing a script task (e.g. callback,
     // event) or microtasks (e.g. promise). This is explicitly needed for
     // Indexed DB transactions per spec, but should in general be avoided.
     void addEndOfScopeTask(PassOwnPtr<EndOfScopeTask>);
     void runEndOfScopeTasks();
     void clearEndOfScopeTasks();
 
-    void setScriptDebugServer(PassOwnPtr<ScriptDebugServer>);
+    void setScriptDebugServer(PassOwnPtrWillBeRawPtr<ScriptDebugServer>);
 
 private:
     V8PerIsolateData();
     ~V8PerIsolateData();
 
     typedef HashMap<const void*, v8::Eternal<v8::FunctionTemplate>> DOMTemplateMap;
     DOMTemplateMap& currentDOMTemplateMap();
     bool hasInstance(const WrapperTypeInfo* untrusted, v8::Handle<v8::Value>, DOMTemplateMap&);
     v8::Local<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Local<v8::Value>, DOMTemplateMap&);
 
@@ skipping 15 matching lines @@
     int m_recursionLevel;
     bool m_isHandlingRecursionLevelError;
     bool m_isReportingException;
 
 #if ENABLE(ASSERT)
     int m_internalScriptRecursionLevel;
 #endif
     bool m_performingMicrotaskCheckpoint;
 
     Vector<OwnPtr<EndOfScopeTask>> m_endOfScopeTasks;
-    OwnPtr<ScriptDebugServer> m_debugServer;
+    OwnPtrWillBePersistent<ScriptDebugServer> m_debugServer;
 };
 
 } // namespace blink
 
 #endif // V8PerIsolateData_h