[chromedriver] Run all tests on WebView test app.

BUG=None
R=craigdh@chromium.org
TBR=navabi@chromium.org

Review URL: https://codereview.chromium.org/92793003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237627 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237627