Block navigations to Google and Youtube for child accounts if they are not signed in.

BUG=697491

Review-Url: https://codereview.chromium.org/2760443002
Cr-Commit-Position: refs/heads/master@{#460753}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 0ef1a88..771af088 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3790,6 +3790,8 @@
       "supervised_user/supervised_user_content_provider_android.h",
       "supervised_user/supervised_user_features.cc",
       "supervised_user/supervised_user_features.h",
+      "supervised_user/supervised_user_google_auth_navigation_throttle.cc",
+      "supervised_user/supervised_user_google_auth_navigation_throttle.h",
       "supervised_user/supervised_user_interstitial.cc",
       "supervised_user/supervised_user_interstitial.h",
       "supervised_user/supervised_user_navigation_observer.cc",