Revert of [Service Manager] Get rid of dynamic service discovery

chromecast/browser/BUILD.gn

Index: chromecast/browser/BUILD.gn
diff --git a/chromecast/browser/BUILD.gn b/chromecast/browser/BUILD.gn
index fb4a6eec845b26c4bad6907d74d8722d192faf23..9fea7c85a00e600a55a17ed6daa42de5749f85ec 100644
--- a/chromecast/browser/BUILD.gn
+++ b/chromecast/browser/BUILD.gn
@@ -182,12 +182,19 @@
 #    for incoming connections. Remember to add the provided interfaces to the
 #    "requires" field in the manifest of the service that needs them.
 #
-service_manifest("cast_content_browser_manifest_overlay") {
+service_manifest_overlay("cast_content_browser_manifest_overlay") {
   source = "cast_content_browser_manifest_overlay.json"
-  packaged_services = [ "//media/mojo/services:media_manifest" ]
+
+  packaged_services = [ "media" ]
+
+  deps = [
+    "//media/mojo/services:media_manifest",
+  ]
 
   if (chromecast_branding != "public") {
-    overlays = [ "//chromecast/internal/shell/browser:cast_content_browser_internal_manifest_overlay" ]
+    overlays = [ "${root_gen_dir}/cast_content_browser_internal_manifest_overlay.json" ]
+
+    deps += [ "//chromecast/internal/shell/browser:cast_content_browser_internal_manifest_overlay" ]
   }
 }