Rename input_method_linux_x11 as input_method_auralinux.

This patch renames input_method_linux_x11 and input_method_auralinux.
This would make it possible for it to be used with Ozone.

TEST=none

Review URL: https://codereview.chromium.org/108143003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239329 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239329