Added anti-singleton services (new process/thread per connection).

mojo/tools/data/nacl_nonsfi_apptests

 # This file contains a list of Non-SFI NaCl Mojo gtest app tests.
 # This must be a valid python dictionary.
 #
 # Multiprocess mode is required for the nonsfi nacl tests: the content
 # handler for these tests must exist in a 32-bit process but the parent
 # may be a 64-bit process. This makes multithreading insufficient for
 # these tests.
 tests = [
   {
     "test": "mojo:monacl_test_nonsfi",
@@ skipping 10 matching lines @@
   {
     "test": "mojo:example_apptests.pexe",
     # ExampleApplicationTest.CheckCommandLineArg checks --example_apptest_arg.
     "shell-args": ["--enable-multiprocess"],
     "test-args": ["--example_apptest_arg"],
   },
   {
     "test": "mojo:files_apptests.pexe",
     "shell-args": ["--enable-multiprocess"],
   },
+  {
+    # This test translates and executes multiple apptests at the same time.
+    # To pass, each intermediate nexe made by pexe content handling must be
+    # given a unique process, or this test will crash.
+    "test": "mojo:files_apptests.pexe",
+    "name": "Multiprocess files + http_server apptests (both run at once)",
+    "shell-args": ["--enable-multiprocess", "mojo:http_server_apptests.pexe"],
+  },
   # TODO(smklein): Include "mojo_view_manager_client_apptests.pexe",
   # "window_manager_apptests.pexe", and "shell_apptests.pexe" once flake is
   # reduced on bots for the Non-NaCl multiprocess version of the test.
   # TODO(smklein): Include "view_manager_service_apptests" once it isn't as
   # slow.
 ]