Pull down webgl conformance tests from github mirror.

(reland after checklicences suppression in r238815)

BUG=325505
TEST=gpu waterfall
R=bajones@chromium.org, brettw@chromium.org, kbr@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=238758

Review URL: https://codereview.chromium.org/100413002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238826 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238827 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238827
Changes to fix issue, when user tries to launch instance of new window from desktop when ASH is already open in Metro mode.
Current implementation causes new window to be opened in desktop mode.

TESTS=Please follow steps as mentioned in bug report.
R=cpu@chromium.org, gab@chromium.org, sky@chromium.org, ananta@chromium.org
BUG=320891

Review URL: https://codereview.chromium.org/103513002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238828 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238828