GitLab

BUG=140248
TEST=Install pkidpnnapnfgjhfhkpmjpbckkbaodldb from the web store, wait for it to finish downloading voice data, then turn speech feedback on/off with Ctrl+Alt+Z and you should hear the high-quality voice.
TBR=derat
Review URL: https://chromiumcodereview.appspot.com/10850018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150089 0039d316-1c4b-4281-b951-d872f2087c98