Add more fine-grained accessibility modes.

content/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/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
@@ skipping 922 matching lines @@
 
 test("content_unittests") {
   # See comment at the top of //content/BUILD.gn for why this is disabled in
   # component builds.
   if (is_component_build) {
     check_includes = false
   }
 
   defines = []
   sources = [
-    "../browser/accessibility/accessibility_mode_helper_unittest.cc",
     "../browser/accessibility/browser_accessibility_mac_unittest.mm",
     "../browser/accessibility/browser_accessibility_manager_unittest.cc",
     "../browser/accessibility/browser_accessibility_win_unittest.cc",
     "../browser/accessibility/one_shot_accessibility_tree_search_unittest.cc",
     "../browser/appcache/appcache_database_unittest.cc",
     "../browser/appcache/appcache_disk_cache_unittest.cc",
     "../browser/appcache/appcache_group_unittest.cc",
     "../browser/appcache/appcache_host_unittest.cc",
     "../browser/appcache/appcache_manifest_parser_unittest.cc",
     "../browser/appcache/appcache_quota_client_unittest.cc",
@@ skipping 768 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }