Disable flaky mojo_service_manager_unittests test

mojo/service_manager/service_manager_unittest.cc

Index: mojo/service_manager/service_manager_unittest.cc
diff --git a/mojo/service_manager/service_manager_unittest.cc b/mojo/service_manager/service_manager_unittest.cc
index b3601e1b44842b1765bf76b059f943123985165e..a42dc5f0c91b4f1ed1cafae54f33c7ad4c1afbb1 100644
--- a/mojo/service_manager/service_manager_unittest.cc
+++ b/mojo/service_manager/service_manager_unittest.cc
@@ -522,7 +522,8 @@ TEST_F(ServiceManagerTest, DISABLED_BDeleted) {
 
 // Confirm that the url of a service is correctly passed to another service that
 // it loads, and that it can be rejected.
-TEST_F(ServiceManagerTest, ANoLoadB) {
+// http://crbug.com/396300
+TEST_F(ServiceManagerTest, DISABLED_ANoLoadB) {
   TesterContext context;
   ServiceManager sm;