UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3079.0 Safari/537.36

Steps to reproduce the problem:
1. create a page with css3 gradient e.g.
	background-color #0a202f
	background-image linear-gradient(rgb(16, 58, 88, 0.8) 1px, transparent 2px), linear-gradient(90deg, rgba(16, 58, 88, 0.8), 1px, transparent 2px), linear-gradient(rgba(16,38,55,0.8) 1px, transparent 1px), linear-gradient(90deg, rgba(16,38,55,0.8) 1px, transparent 1px)
	background-size 80px 80px, 80px 80px, 10px 10px, 10px 10px
	background-position -2px -2px, -2px -2px, -1px -1px, -1px -1px

2. open the page
3. the screen blurred

What is the expected behavior?

What went wrong?
the screen blurred
other browser like safari is OK

Did this work before? N/A 

Chrome version: 60.0.3079.0  Channel: n/a
OS Version: OS X 10.12.4
Flash Version:
 

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