Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/web/ValidationMessageClientImpl.h

 /*
  * Copyright (C) 2012 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 29 matching lines @@
 class ValidationMessageClientImpl final : public GarbageCollectedFinalized<ValidationMessageClientImpl>, public ValidationMessageClient {
     USING_GARBAGE_COLLECTED_MIXIN(ValidationMessageClientImpl);
 public:
     static ValidationMessageClientImpl* create(WebViewImpl&);
     ~ValidationMessageClientImpl() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     ValidationMessageClientImpl(WebViewImpl&);
-    void checkAnchorStatus(Timer<ValidationMessageClientImpl>*);
+    void checkAnchorStatus(TimerBase*);
     FrameView* currentView();
 
     void showValidationMessage(const Element& anchor, const String& message, TextDirection messageDir, const String& subMessage, TextDirection subMessageDir) override;
     void hideValidationMessage(const Element& anchor) override;
     bool isValidationMessageVisible(const Element& anchor) override;
     void documentDetached(const Document&) override;
     void willBeDestroyed() override;
 
     WebViewImpl& m_webView;
     Member<const Element> m_currentAnchor;
     String m_message;
     IntRect m_lastAnchorRectInScreen;
     float m_lastPageScaleFactor;
     double m_finishTime;
     Timer<ValidationMessageClientImpl> m_timer;
 };
 
 } // namespace blink
 
 #endif