Use ChannelMojo from the browser to NaCl loader process.

components/nacl/broker/BUILD.gn

 # Copyright 2016 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/compiler/compiler.gni")
 
 # This file builds nacl64.exe, which is a 64-bit x86 Windows executable
 # used only in the 32-bit x86 Windows build.  The :broker code runs both
 # in nacl64.exe and in the 32-bit chrome executable, to launch
 # nacl64.exe and communicate with it.
 
 assert(enable_nacl)
 assert(is_win)
 assert(target_cpu == "x86")
 
 source_set("broker") {
   sources = [
     "nacl_broker_listener.cc",
     "nacl_broker_listener.h",
   ]
 
   deps = [
     "//base",
     "//components/nacl/common:debug_exception_handler",
     "//components/nacl/common:minimal",
     "//components/nacl/common:switches",
     "//content/public/common:static_switches",
     "//ipc",
+    "//mojo/edk/system",
     "//sandbox",
   ]
 
   if (current_cpu == target_cpu) {
     deps += [ "//content/public/common" ]
   } else {
     deps += [ ":content_dummy" ]
   }
 }
 
@@ skipping 120 matching lines @@
       "//chrome/installer/util:with_no_strings",
       "//components/browser_watcher:browser_watcher_client",
       "//components/flags_ui:switches",
       "//components/policy:generated",
       "//content/public/common:static_switches",
       "//ipc",
       "//third_party/kasko",
     ]
   }
 }