Fixed button centering.

BUG=None
TEST=Manual


Review URL: http://codereview.chromium.org/9700029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126811 0039d316-1c4b-4281-b951-d872f2087c98

remoting/webapp/main.html

@@ -394,7 +394,7 @@ found in the LICENSE file.
            i18n-content="CONFIRM_HOST_DELETE"
            class="message">
         </p>
-        <div class="centered-button">
+        <div class="centered">
           <button id="confirm-host-delete"
                   i18n-content="YES"
                   type="button">