Move JS support code from //mojo/edk/js to //services/js/system

services/js/system/tests/BUILD.gn

Index: services/js/system/tests/BUILD.gn
diff --git a/services/js/modules/clock/test/BUILD.gn b/services/js/system/tests/BUILD.gn
similarity index 56%
copy from services/js/modules/clock/test/BUILD.gn
copy to services/js/system/tests/BUILD.gn
index baa818d84813345d14e7333a3c88481f37e7039f..8eed0a33cfab7ff389ef70229a688ac36038b7aa 100644
--- a/services/js/modules/clock/test/BUILD.gn
+++ b/services/js/system/tests/BUILD.gn
@@ -2,20 +2,29 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("test") {
+import("//mojo/public/tools/bindings/mojom.gni")
+
+source_set("js_to_cpp_tests") {
   testonly = true
+
   deps = [
+    ":js_to_cpp_bindings",
     "//gin:gin_test",
-    "//mojo/edk/js",
-    "//mojo/edk/test:run_all_unittests",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
     "//mojo/public/interfaces/bindings/tests:test_interfaces",
-    "//services/js/modules/clock",
+    "//mojo/public/interfaces/bindings/tests:test_interfaces_experimental",
+    "//services/js/system",
+  ]
+
+  sources = [
+    "js_to_cpp_tests.cc",
   ]
+}
 
+mojom("js_to_cpp_bindings") {
   sources = [
-    "run_clock_tests.cc",
+    "js_to_cpp.mojom",
   ]
 }