Fix a string for chromebook 11 charger message.

BUG=340711
TBR=joshwood

Review URL: https://codereview.chromium.org/136973013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249542 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249542