UserAgent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36

Steps to reproduce the problem:
1. open google chrome
2. select option
3. cant find the option to change to chrome os

What is the expected behavior?
I should be able to find the option of relaunch chrome in windows 8 mode

What went wrong?
I should be able to find the option as i have about approx 1600mb graphics, 4 gb ram, 3.10 ghz intel pentium processor
but i am not able to :(

Did this work before? N/A 

Chrome version: 51.0.2704.106  Channel: stable
OS Version: 8.1
Flash Version: Shockwave Flash 22.0 r0