Enable a bunch of webgl conformance tests on win intel gpu bot

BUG=
TEST=win gpu intel bot
TBR=kbr@chromium.org

Review URL: https://codereview.chromium.org/174413004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252392 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252392
Also account for IsEnrolledToDomain() in PrefHashBrowserTests.

Restores test for kSettingsEnforcementGroupEnforceAlways in PrefHashBrowserTests (temporarily disabled in the last patch set of crrev.com/251700).

Review URL: https://codereview.chromium.org/163773008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252394 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252394