Mojo Example that demos the difference between providing and requesting an interface

sky/services/testing/BUILD.gn

Index: sky/services/testing/BUILD.gn
diff --git a/sky/services/testing/BUILD.gn b/sky/services/testing/BUILD.gn
index 23af71237c303d94d8f841944389a0fcd3e3f50c..316c447faff938780c2f21fd30e9cbd07ba36d03 100644
--- a/sky/services/testing/BUILD.gn
+++ b/sky/services/testing/BUILD.gn
@@ -8,4 +8,8 @@ mojom("bindings") {
   sources = [
     "test_harness.mojom",
   ]
+
+  deps = [
+    "//mojo/services/public/interfaces/input_events",
+  ]
 }