Add a test extension signed with a 2048-bit key

Add an extension signed with a 2048-bit key to the
chrome/test/data/extensions directory.  A unit test that checks loading
of the new extension will be checked in separately; the .crx file is
being committed separately without any test changes since it is a binary
file and can't go in via the commit queue.

The full change is being reviewed in
https://codereview.chromium.org/23531061/

BUG=293661
R=felt@chromium.org

Review URL: https://codereview.chromium.org/23494061

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224800 0039d316-1c4b-4281-b951-d872f2087c98
Fix reference to "extensions" in externally_connectable.html, which is also
apps.  The PRESUBMIT (wrongly) told me to change a <a> to a $ref, so disable it.

R=scheib@chromium.org
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/24225005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224801 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224800
Removing O2TS.StartRequest OVERRIDE from test_profile_sync_service.cc

(This is part of removing virtual keyword from O2TS.StartRequest)

Dependent on https://codereview.chromium.org/23382008/

BUG=282454

Review URL: https://chromiumcodereview.appspot.com/24269011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224802 0039d316-1c4b-4281-b951-d872f2087c98
Draw Mac omnibox border using bitmaps

Currently the omnibox border is drawn using NSBezierPaths. This CL
switches to using bitmaps.

The Views version of this CL is crrev.com/16286003.

Screenshots 1x:
  normal: http://i.imgur.com/1BMvJbf.png
  popup: http://i.imgur.com/kLlDwYh.png
  theme: http://i.imgur.com/msNHV5D.png

Screenshots 2x:
  normal: http://i.imgur.com/yIlh0L5.png
  popup: http://i.imgur.com/LdEo8gM.png
  theme: http://i.imgur.com/uWQPt9w.png

BUG=231005, 172742
TEST=Ran Chrome. Verified that the omnibox looked correct.
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/24292002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224803 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224802
SVN changes up to revision 224803