Update Ozone IME class definitions

The IME interfaces changed. This fixes the Ozone build.

TBR=rjkroege@chromium.org
NOTRY=true

BUG=

Review URL: https://codereview.chromium.org/106793010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241866 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241866