Remove KeyboardCodeFromGdkEventKey.

The code which used it was removed in r127507, so there's no reason to keep
it alive.

BUG=
R=ben@chromium.org,sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/17093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@206765 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed