Try re-enabling more OOPIF tests.

There have been no flakes reported on EmulatedTouchPinchGoesToMainFrame
since https://chromium-review.googlesource.com/c/chromium/src/+/1172723
went in, so let's try re-enabling some more tests.

Bug: 833380
Change-Id: If406a6f5d7b0a88e84cad84e07d1bba547eb1baa
Reviewed-on: https://chromium-review.googlesource.com/1177843
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583670}
1 file changed