Mus experiment in content shell on Android.

services/ui/public/cpp/BUILD.gn

Index: services/ui/public/cpp/BUILD.gn
diff --git a/services/ui/public/cpp/BUILD.gn b/services/ui/public/cpp/BUILD.gn
index c8cf62b40547753a9240e750d4731302b2414010..daeea3a5303689bda4e9787e1e0613f00e2ac749 100644
--- a/services/ui/public/cpp/BUILD.gn
+++ b/services/ui/public/cpp/BUILD.gn
@@ -73,7 +73,11 @@ source_set("cpp") {
 source_set("internal_or_test") {
   visibility = [
     "./*",
-    "//services/ui/ws:mus_ws_unittests",
+
+    # We have to be visible to * because the test rule on Android generates
+    # sub-targets prefixed with mus_ws_unittests, but mus_ws_unittests* won't
+    # work in GN.
+    "//services/ui/ws/*",
     "//ui/views/mus:views_mus_unittests",
   ]
 
@@ -92,6 +96,7 @@ source_set("internal") {
   # the 'cpp' target.
   visibility = [
     ":cpp",
+    "//services/ui/demo:mus_demo_lib",
     "//services/ui/demo:mus_demo_library",
   ]