UnloadSupport firing timer continuously on Android Chrome

I am debugging a gwt application on Android Chrome through Chrome remote debugging and observed on timeline that timer is continuously (~ evert 250ms) firing with following details, is this a bug? Timer Fired - Details
Duration	2.288 ms (at 10.20 s)
Self Time	2.288 ms
CPU Time	2.288 ms
Aggregated Time	2.288 ms
Timer ID	4030
Timeout	250 ms
Repeats	false
Function Call	UnloadSupport.java:41
Used Heap Size	12.4 MB (+640 B)
Timer installed	setTimeout0 @ UnloadSupport.java:41 $setTimeout @ UnloadSupport.java:86 setTimeout_0 @ Impl.java:254 checkHistoryCycle @ HistoryImplTimer.java:49 (anonymous function) @ UnloadSupport.java:42

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