Limit the length of managed user name to 50 symbols.

BUG=259092
NOTRY=true
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/22877002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217033 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/chromeos/login/screen_locally_managed_user_creation.html

@@ -34,7 +34,7 @@
               class="page-title-explanation inline"></div>
         </div>
         <div id="managed-user-creation-name-block">
-          <input id="managed-user-creation-name" type="text" />
+          <input id="managed-user-creation-name" type="text" maxlength="50" />
           <span id="managed-user-creation-name-error" class="no-error">
           </span>
         </div>