Docserver: Fix Redirector to return relative paths when relative redirects are
specified, rather than always absolute redirects. Also fix it not to crash when
directories without redirects are fetched.

R=yoz@chromium.org

Review URL: https://codereview.chromium.org/174393003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252432 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252432
Turn on a few skipped tests.

See try jobs on patch set 1.  All returned passing.

Including four slow tests on all platforms:
1) large-loop-compile.html
2) texture-size-limit.html
3) context-creation-and-destruction.html
4) multisample-corruption.html

Mac failure:
1) control_flow_001_to_008.html

I'll watch the bots that are not covered by try jobs.

BUG=322764,322789,322689,322795
TEST=gpu bots
TBR=kbr@chromium.org

Review URL: https://codereview.chromium.org/169763005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252433 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252433