Prevent LinearRegression from dividing by zero so the GenerateBenchGraphs step doesn't blow up if the data is all zeroes.

http://codereview.appspot.com/6546049/



git-svn-id: http://skia.googlecode.com/svn/trunk@5615 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed