Remove OAuth2 token commandline switch

Switch sync to always use OAuth2 tokens and remove corresponding flags 
and command line switch.

Review URL: https://codereview.chromium.org/22342003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230343 0039d316-1c4b-4281-b951-d872f2087c98
[rAc] Draw invalid combobox with white text for higher contrast against the red background.

BUG=308185
TEST=Invalid comboboxes are drawn with red background and white text on Mac.
R=groby@chromium.org

Review URL: https://codereview.chromium.org/31083007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230344 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230344
cros: Remove the --no-discard-tabs flag

This flag has been on-by-default for over a year. Also, tab discards are
less common now that zram is on by default.

BUG=307084
TEST=about:flags no longer contains "Don't discard tabs"

Review URL: https://codereview.chromium.org/34353006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230345 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230345