GitLab

Fix the zoom level so that the layout is predictable. Otherwise tests
that sample pixels would sample incorrect pixels.

BUG=368495

Review URL: https://codereview.chromium.org/308033002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273755 0039d316-1c4b-4281-b951-d872f2087c98