Add newline to end of file.

Fix [-Werror,-Wnewline-eof] error in base/test/unit_test_launcher_ios.cc

BUG=None
TEST=None

Review URL: https://codereview.chromium.org/25997003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227517 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227517