GitLab

Reverting bacuse of failure of ClosingWindowWhilePrintingShouldNotCrash
after it was enabled by this change on Linux Tests.

> Remove kEnablePrintPreview now that the pdf plugin is part of Chromium.
> 
> R=thestig@chromium.org
> 
> Review URL: https://codereview.chromium.org/296453015

TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/299273003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272622 0039d316-1c4b-4281-b951-d872f2087c98