Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h

Index: third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h
diff --git a/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h b/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h
index 35e6148a087b043a2029483d02eb628947dfd1b0..163d8a83fd3228a3234ee9883ae55030e69a86d9 100644
--- a/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h
+++ b/third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h
@@ -58,11 +58,11 @@ private:
     void invalidateRect(const IntRect&) override;
     void scheduleAnimation(Widget*) override;
 
-    void setTimer(Timer<SVGImageChromeClient>*);
-    void animationTimerFired(Timer<SVGImageChromeClient>*);
+    void setTimer(std::unique_ptr<TimerBase>);
+    void animationTimerFired(TimerBase*);
 
     SVGImage* m_image;
-    std::unique_ptr<Timer<SVGImageChromeClient>> m_animationTimer;
+    std::unique_ptr<TimerBase> m_animationTimer;
     enum {
         Running,
         Suspended,