[feature_notification_guide] Initial directory setup

This CL sets up the initial directory setup for feature notification
guide which includes public, internal, test and factory targets and top
level service. Java targets will be set up in a later CL.

Bug: 1275371
Change-Id: Iadf44ea81570225c932db2497cfee4f7ef0fe1cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3309600
Reviewed-by: Henrique Nakashima <[email protected]>
Reviewed-by: Xing Liu <[email protected]>
Reviewed-by: David Trainor <[email protected]>
Commit-Queue: Shakti Sahu <[email protected]>
Cr-Commit-Position: refs/heads/main@{#947753}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 5dd3db3b..36c98c81 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -1966,6 +1966,8 @@
     "//chrome/browser/browsing_data:constants",
     "//chrome/browser/commerce:feature_list",
     "//chrome/browser/devtools",
+    "//chrome/browser/feature_guide/notifications:factory",
+    "//chrome/browser/feature_guide/notifications:public",
     "//chrome/browser/image_decoder",
     "//chrome/browser/media:media_engagement_preload_proto",
     "//chrome/browser/media:mojo_bindings",