[Smart Lock] Add error strings to show when the phone's software is out of date.

chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc

Index: chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
diff --git a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
index e3b1dd86096d3e24efa4c1ecd108404725c773c0..066dedeb48c1da8d9c7f3fcc6f389e9c4879c198 100644
--- a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
+++ b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
@@ -215,6 +215,10 @@ bool EasyUnlockPrivateGetStringsFunction::RunSync() {
       l10n_util::GetStringUTF16(
           IDS_EASY_UNLOCK_SETUP_INTRO_RETRY_FIND_PHONE_BUTTON_LABEL));
   strings->SetString(
+      "setupIntroCloseFindPhoneButtonLabel",
+      l10n_util::GetStringUTF16(
+          IDS_EASY_UNLOCK_SETUP_INTRO_CLOSE_FIND_PHONE_BUTTON_LABEL));
+  strings->SetString(
       "setupIntroHowIsThisSecureLinkText",
       l10n_util::GetStringUTF16(
           IDS_EASY_UNLOCK_SETUP_INTRO_HOW_IS_THIS_SECURE_LINK_TEXT));
@@ -305,6 +309,10 @@ bool EasyUnlockPrivateGetStringsFunction::RunSync() {
       l10n_util::GetStringFUTF16(
           IDS_EASY_UNLOCK_SETUP_ERROR_OFFLINE, device_type));
   strings->SetString(
+      "setupErrorRemoteSoftwareOutOfDate",
+      l10n_util::GetStringUTF16(
+          IDS_EASY_UNLOCK_SETUP_ERROR_REMOTE_SOFTWARE_OUT_OF_DATE));
+  strings->SetString(
       "setupErrorFindingPhone",
       l10n_util::GetStringUTF16(IDS_EASY_UNLOCK_SETUP_ERROR_FINDING_PHONE));
   strings->SetString(