Revert of [mojo-bindings] Use Watch API instead of MessagePumpMojo

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")
 
 if (is_android) {
@@ skipping 51 matching lines @@
     "//components/syncable_prefs:unit_tests",
     "//components/translate/core/browser:unit_tests",
     "//components/translate/core/common:unit_tests",
     "//components/translate/core/language_detection:unit_tests",
     "//components/undo:unit_tests",
     "//components/update_client:unit_tests",
     "//components/upload_list:unit_tests",
     "//components/variations:unit_tests",
     "//components/variations/service:unit_tests",
     "//components/web_resource:unit_tests",
-    "//mojo/edk/system",
+    "//mojo/edk/embedder:headers",
     "//net",
     "//testing/gtest",
     "//ui/base",
     "//ui/resources:ui_test_pak",
   ]
 
   if (is_ios) {
     deps += [
       "//components/signin/ios/browser:unit_tests",
       "//components/translate/ios/browser:unit_tests",
@@ skipping 352 matching lines @@
   if (!is_ios) {
     deps += [
       "//base",
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
     ]
   }
 }