Use Mojo pipes to signal sync IPC events

chrome/chrome_watcher/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("//chrome/version.gni")
 import("//testing/test.gni")
 import("//third_party/kasko/kasko.gni")
 
 source_set("client") {
   sources = [
@@ skipping 61 matching lines @@
   deps = [
     ":chrome_watcher_resources",
     ":client",
     ":kasko_util",
     "//base",
     "//base:base_static",
     "//build/config/sanitizers:deps",
     "//chrome/common:metrics_constants_util_win",
     "//chrome/installer/util:with_no_strings",
     "//components/browser_watcher",
+    "//mojo/public/c/system:for_shared_library",
   ]
   ldflags = [ "/DEF:" + rebase_path("chrome_watcher.def", root_build_dir) ]
   configs -= [ "//build/config/win:console" ]
   configs += [ "//build/config/win:windowed" ]
 }