Makes us compile mojo_view_manager_lib_unittests

components/view_manager/BUILD.gn

Index: components/view_manager/BUILD.gn
diff --git a/components/view_manager/BUILD.gn b/components/view_manager/BUILD.gn
index cc80fb7b38ccc7a4352c72c79f5e9a1c1e212b8c..4b66b36b663519bca7ec4e5160c12e6a04ab1e98 100644
--- a/components/view_manager/BUILD.gn
+++ b/components/view_manager/BUILD.gn
@@ -111,8 +111,16 @@ source_set("test_support") {
   ]
 }
 
-test("tests") {
-  output_name = "view_manager_unittests"
+group("tests") {
+  testonly = true
+  deps = [
+    ":apptests",
+    ":view_manager_unittests",
+    "//components/view_manager/public/cpp/tests:mojo_view_manager_lib_unittests",
+  ]
+}
+
+test("view_manager_unittests") {
   sources = [
     "animation_runner_unittest.cc",
     "focus_controller_unittest.cc",