MD User Manager: change 'save' button text.

Bug: 722788
Change-Id: I3235f1245587720bea79ee91cd28aac5cfa60928
Reviewed-on: https://chromium-review.googlesource.com/739386Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513173}

chrome/browser/ui/webui/signin/signin_create_profile_handler.cc

@@ -86,7 +86,7 @@ void SigninCreateProfileHandler::GetLocalizedValues(
       l10n_util::GetStringUTF16(
           IDS_PROFILES_CREATE_SUPERVISED_NO_SIGNED_IN_USER_TEXT));
   localized_strings->SetString("createProfileConfirm",
-                               l10n_util::GetStringUTF16(IDS_SAVE));
+                               l10n_util::GetStringUTF16(IDS_ADD));
   localized_strings->SetString("learnMore",
                                l10n_util::GetStringUTF16(IDS_LEARN_MORE));
   localized_strings->SetString(