Disable flaky mojo_service_manager_unittests test

Likely failure is due to http://crbug.com/396300. Disable until I can
investigate more thoroughly.

TBR=darin@chromium.org

Review URL: https://codereview.chromium.org/414893003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285155 0039d316-1c4b-4281-b951-d872f2087c98

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;