Create a about handler component.

chrome/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/chrome_tests.gni")
 import("//chrome/test/base/js2gtest.gni")
@@ skipping 1876 matching lines @@
 
       defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
 
       deps = [
         ":test_support",
         "//base",
         "//base:i18n",
         "//base/test:test_support",
         "//chrome/browser",
         "//chrome/renderer",
+        "//components/about_handler",
         "//components/autofill/content/browser/wallet:test_support",
         "//components/autofill/content/renderer:test_support",
         "//media/cast:test_support",
         "//testing/gmock",
         "//testing/gtest",
         "//testing/perf",
       ]
 
       if (is_win) {
         configs -= [ "//build/config/win:default_incremental_linking" ]
@@ skipping 40 matching lines @@
     "//third_party/mojo/src/mojo/edk/system",
   ]
 
   if (!is_android && use_ash) {
     sources += rebase_path(
             chrome_tests_unit_gypi_values.chrome_test_support_unit_ash_sources,
             ".",
             "//chrome")
   }
 }