mash: Do not use InProcessContextFactory in tests.

mash/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 
 # Target that builders build.
 group("all") {
@@ skipping 113 matching lines @@
       "test/mash_test_suite.h",
       "test/mash_unittests.cc",
     ]
     deps = [
       "//ash/common:unittests",
       "//ash/common/test:test_support",
       "//ash/mus:resources",
       "//ash/mus:unittests",
       "//base",
       "//base/test:test_support",
+      "//cc",
+      "//cc:test_support",
       "//services/service_manager/background:main",
       "//ui/aura",
       "//ui/base",
       "//ui/compositor:test_support",
       "//ui/gl:test_support",
     ]
     data_deps = [
       ":unittests_manifest",
       "//ash/mus:resources",
     ]
   }
 
   service_manifest("unittests_manifest") {
     name = "mash_unittests"
     source = "unittests_manifest.json"
   }
 }