Move test runner to a component

components/BUILD.gn

 # Copyright 2014 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 # Collection of all components. You wouldn't link to this, but this is rather
@@ skipping 223 matching lines @@
   }
 
   if (!is_ios) {
     deps += [
       "//components/app_modal",
       "//components/browsing_data",
       "//components/guest_view/browser",
       "//components/guest_view/common",
       "//components/guest_view/renderer",
       "//components/scheduler",
+      "//components/test_runner",
     ]
   }
 
   if (toolkit_views) {
     deps += [ "//components/constrained_window" ]
   }
 }
 
 # To add a unit test to this target, make a "unit_test" source_set in your
 # component (it's important to use a source_set instead of a static library or
@@ skipping 173 matching lines @@
 
   deps = [
     "//base",
     "//base/test:test_support_perf",
     "//testing/gtest",
     "//testing/perf",
     "//content/test:test_support",
     "//components/visitedlink/browser",
   ]
 }