Added animation for status tray items (labels) when the shelf is in vertical position.

The code path had not been updated to provide animation in the correct axis when the shelf was vertical, resulting in labels to be offset by an incorrect amount (most visible in the IME label).

BUG=316635, 307116

Review URL: https://codereview.chromium.org/68373006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236115 0039d316-1c4b-4281-b951-d872f2087c98
InstantExtended: remove old flags, add new flag for query extraction.

This change does three things:
  (1) Remove flags for Instant Extended. Instant Extended is now always on.
  (2) Add a separate flag to control query extraction. Also rename
      suppress_on_srp to query_extraction to make its purpose clearer.
  (3) Assorted cleanup resulting from (1) and (2).

Note that a lot more code (especially in search.cc) can be cleaned up and I
will address that in follow up changes. Attempting to keep this from
snowballing into a huge CL.

BUG=297915

Review URL: https://codereview.chromium.org/73613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236116 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236116