Upstream iOS SSL blocking page.

BUG=574038

Review URL: https://codereview.chromium.org/1566753002

Cr-Commit-Position: refs/heads/master@{#367879}
diff --git a/ios/chrome/browser/BUILD.gn b/ios/chrome/browser/BUILD.gn
index 084fb60..e8a8c207 100644
--- a/ios/chrome/browser/BUILD.gn
+++ b/ios/chrome/browser/BUILD.gn
@@ -345,6 +345,8 @@
     "snapshots/snapshot_overlay.mm",
     "snapshots/snapshots_util.h",
     "snapshots/snapshots_util.mm",
+    "ssl/ios_ssl_blocking_page.cc",
+    "ssl/ios_ssl_blocking_page.h",
     "suggestions/image_fetcher_impl.h",
     "suggestions/image_fetcher_impl.mm",
     "suggestions/suggestions_service_factory.h",