[Offline pages] Add new Error page failure status inside the MHTML archiver and update correspondin…

components/offline_pages/core/offline_page_model_impl.cc

Index: components/offline_pages/core/offline_page_model_impl.cc
diff --git a/components/offline_pages/core/offline_page_model_impl.cc b/components/offline_pages/core/offline_page_model_impl.cc
index 2338be5a990958fb3060ab4193bb540b625f2c3f..fd8c266a90582b3c39f94c5704b1eccf8fb03558 100644
--- a/components/offline_pages/core/offline_page_model_impl.cc
+++ b/components/offline_pages/core/offline_page_model_impl.cc
@@ -72,6 +72,11 @@ SavePageResult ToSavePageResult(ArchiverResult archiver_result) {
     case ArchiverResult::ERROR_SECURITY_CERTIFICATE:
       result = SavePageResult::SECURITY_CERTIFICATE_ERROR;
       break;
+    case ArchiverResult::ERROR_ERROR_PAGE:
+      result = SavePageResult::ERROR_PAGE;
+      break;
+    case ArchiverResult::ERROR_INTERSTITIAL_PAGE:
+      result = SavePageResult::INTERSTITIAL_PAGE;
     default:
       NOTREACHED();
       result = SavePageResult::CONTENT_UNAVAILABLE;