Put code in //services/js in namespace js

services/js/pingpong_apptest.cc

Index: services/js/pingpong_apptest.cc
diff --git a/services/js/pingpong_apptest.cc b/services/js/pingpong_apptest.cc
index 6d0911c1f4d12b4e09bd5b5ec2d59ed24ac32143..32e63001ed2327cea04ee6d927513cbaff9f2f95 100644
--- a/services/js/pingpong_apptest.cc
+++ b/services/js/pingpong_apptest.cc
@@ -5,7 +5,7 @@
 #include "services/js/test/js_application_test_base.h"
 #include "services/js/test/pingpong_service.mojom.h"
 
-namespace mojo {
+namespace js {
 namespace {
 
 class PingPongClientImpl : public PingPongClient {
@@ -80,4 +80,4 @@ TEST_F(JSPingPongTest, PingTargetApp) {
 }
 
 }  // namespace
-}  // namespace mojo
+}  // namespace js