GitLab

This CL factors out some common code from OmniboxViewViews unit tests
that test simplified domain field trials:
* Stepping through an animation
* Setup code that sets the display URL
* Simulating a navigation and checking that the URL is elided or
  unelided afterwards

Bug: 1102572
Change-Id: If388d8174cdbaa822478ed93b7ec7782bfec2c18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363368
Commit-Queue: Emily Stark <estark@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799821}