Disable failing PreviewsLitePageServerBrowserTest test

The following tests fail on Linux trybots:
URLLoaderImplementation/PreviewsLitePageServerBrowserTest.LitePagePreviewsTriggering/0
URLLoaderImplementation/PreviewsLitePageServerBrowserTest.ReloadingLitePagesDisablesLitePages/0

TBR=ryansturm@chromium.org

Bug: 934955
Change-Id: I9701e912909d694fe4cdbd3f2a3f8dc3c5de6723
Reviewed-on: https://chromium-review.googlesource.com/c/1483674
Reviewed-by: Kristi Park <kristipark@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Reviewed-by: Robert Ogden <robertogden@chromium.org>
Commit-Queue: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634827}
1 file changed