[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/bindings/core/v8/WindowProxyManager.h

 // Copyright 2015 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 WindowProxyManager_h
 #define WindowProxyManager_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 #include <utility>
 #include <v8.h>
 
 namespace blink {
 
 class DOMWrapperWorld;
 class Frame;
 class ScriptState;
 class SecurityOrigin;
 class WindowProxy;
 
 class CORE_EXPORT WindowProxyManager final : public NoBaseWillBeGarbageCollectedFinalized<WindowProxyManager> {
     USING_FAST_MALLOC_WILL_BE_REMOVED(WindowProxyManager);
 public:
     static PassOwnPtrWillBeRawPtr<WindowProxyManager> create(Frame&);
 
     ~WindowProxyManager();
     DECLARE_TRACE();
 
-    Frame* frame() const { return m_frame.get(); }
+    Frame* frame() const;
     v8::Isolate* isolate() const { return m_isolate; }
-    WindowProxy* mainWorldProxy() const { return m_windowProxy.get(); }
+    WindowProxy* mainWorldProxy() const;
 
     WindowProxy* windowProxy(DOMWrapperWorld&);
 
     void clearForClose();
     void clearForNavigation();
 
     // For devtools:
     WindowProxy* existingWindowProxy(DOMWrapperWorld&);
     void collectIsolatedContexts(Vector<std::pair<ScriptState*, SecurityOrigin*>>&);
 
     void releaseGlobals(HashMap<DOMWrapperWorld*, v8::Local<v8::Object>>&);
     void setGlobals(const HashMap<DOMWrapperWorld*, v8::Local<v8::Object>>&);
 
 private:
     typedef WillBeHeapHashMap<int, OwnPtrWillBeMember<WindowProxy>> IsolatedWorldMap;
 
     explicit WindowProxyManager(Frame&);
 
     RawPtrWillBeMember<Frame> m_frame;
     v8::Isolate* const m_isolate;
 
     const OwnPtrWillBeMember<WindowProxy> m_windowProxy;
     IsolatedWorldMap m_isolatedWorlds;
 };
 
 } // namespace blink
 
 #endif // WindowProxyManager_h