Bugfix in stats_bb8.py: make sure we use int in the argument of range 
Bugfix in stats_bb8.py: make sure we use int in the argument of range 

We (the dart team) experienced issues where the "timeRange" variable
was a double instead of an int.


Review URL: https://chromiumcodereview.appspot.com/11411281

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@170709 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build