Do not turn transient network issues to permanent sync issues.

The Android framework does not provide enough information to decide
whether an authentication related issue is transient or permanent.

This CL ensures that an auth issue is never considered permanent for
Chrome sync, if the auth issue arised from trying to acquire auth
tokens.

BUG=302141
TBR=tim@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/25745005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227145 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227145
omnibox: Nuke the InstantExtended provider list.

InstantExtended is launched by default, so it doesn't make sense to keep
a "separate" provider list for it.

BUG=252892
TEST=none

Review URL: https://codereview.chromium.org/25927002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227146 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227146