Update defaults for InstantExtended.

Flip the InstantExtended New Tab page to on by default and remove the flags. 
Add a separate flag to control query in the omnibox (which is still off by
default).

Also fixes a ton of tests that needed adjusting for Instant Extended. Mostly
the changes stem from the fact that we're prerendering the Instant Extended
New Tab page which changes assumptions in a bunch of tests.

BUG=297915

Review URL: https://codereview.chromium.org/24733003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228779 0039d316-1c4b-4281-b951-d872f2087c98
Revert "cc: Temporary diagnostics."

This reverts commit d96fe727ec06c9adb8a474464fcca23867373f86.

The commit is not needed as well as causes crash with --single-process.

BUG=160485, 307545

Review URL: https://codereview.chromium.org/27326003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228780 0039d316-1c4b-4281-b951-d872f2087c98
Adding weitaosu@ and removing alexeypa@.

BUG=
R=sergeyu@chromium.org

Review URL: https://codereview.chromium.org/27192007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228781 0039d316-1c4b-4281-b951-d872f2087c98
Remove GetEAPForEthernet error messages from tests.

This removes error messages like
  network_state_handler.cc:404 GetEAPForEthernet: Unknown device eth1 of connected ethernet service 
when running browser tests.

BUG=NONE

Review URL: https://codereview.chromium.org/27328002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228782 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228781
SVN changes up to revision 228782