First CWVWebViewConfiguration unit test

Don't initialize any globals defined in web_view_global_state_util.mm
when running unit tests. This is to avoid conflicts with those globals
initialized by the unit test host app.

Change-Id: I8b6e1381092c3950fe19b753a7616ac602bad74d
Bug: 799091
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1700533
Commit-Queue: John Wu <jzw@chromium.org>
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#679327}
5 files changed