Remove a bunch of dead or defunct webkitpy code

-Remove queries commands that either throw a stacktrace or use a list of
builders from build.webkit.org(!!!). At some point, we should
get rid of the BuildBot code that looks at webkit.org entirely.
-Stop prompting in webkit-patch rebaseline for the list of failing
tests. This code is broken and noone uses this feature anyways.
-Delete a bunch of methods in buildbot.py now that they're unused.

This is in preparation for making the auto-rebaseline script use
latest_layout_test_results. Easier to delete all the old code than
try to bring it up to date.

Review URL: https://chromiumcodereview.appspot.com/18737003

git-svn-id: svn://svn.chromium.org/blink/trunk@153649 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add baselines for "Add support for accelerated fixed root background"

This patch adds non-mac baselines for:
  compositing/fixed-body-background-positioned.html

TBR=jamesr
BUG=180885

Review URL: https://codereview.chromium.org/18800002

git-svn-id: svn://svn.chromium.org/blink/trunk@153650 bbb929c8-8fbe-4397-9dbb-9b2b20218538