Move VTTRegion Timers to TaskRunnerTimer

third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h

Index: third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h
diff --git a/third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h b/third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h
index 4ec0baf723c847f19d727c115bb4ef4ad5ed9606..1962f98b5fa4a61d75605752851017228ba01aa7 100644
--- a/third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h
+++ b/third_party/WebKit/Source/core/html/track/vtt/VTTRegion.h
@@ -102,6 +102,8 @@ class VTTRegion final : public GarbageCollectedFinalized<VTTRegion>,
 
   void prepareRegionDisplayTree();
 
+  void prepareScrollTimer(Document&);
+
   // The timer is needed to continue processing when cue scrolling ended.
   void startTimer();
   void stopTimer();
@@ -150,7 +152,7 @@ class VTTRegion final : public GarbageCollectedFinalized<VTTRegion>,
   // soon as the animation for rolling out one line has finished, but
   // currently it is used also for non-scrolling regions to use a single
   // code path.
-  Timer<VTTRegion> m_scrollTimer;
+  std::unique_ptr<TaskRunnerTimer<VTTRegion>> m_scrollTimer;

[haraken, 2017/02/08 11:49:40]

Can we just use TaskRunnerTimer<VTTRegion> ?

[maksims (do not use this acc), 2017/02/08 13:02:05]

Otherwise I cannot provide TaskRunnerTimer with appropriate task runner, which
is taken from document's frame later on, early in ctor

 };
 
 }  // namespace blink