MAC / Apple Computers
1. Open Terminal and Copy & Past the following
2. Defaults write com.google.Chrome DisablePrintPreview -boolean true
3. Press Enter.. That all. close Chrome and reopen..
Btw if you have messed with about:flags the only way to reset its as follows
1. close Chrome
2. delete the Local State file located at /Users/your Name/Library/Application Support/Google/Chrome
For windows there are many Links