Use ChannelMojo from the browser to NaCl loader process.

components/nacl/browser/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("//build/config/features.gni")
 
 assert(enable_nacl)
 
 source_set("browser") {
   sources = [
@@ skipping 21 matching lines @@
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//components/nacl/common",
     "//components/nacl/common:debug_exception_handler",
     "//components/url_formatter",
     "//content/public/browser",
     "//content/public/common",
     "//ipc",
+    "//mojo/edk/system",
     "//native_client/src/trusted/service_runtime:sel_main_chrome",
     "//net",
     "//ppapi/host",
     "//ppapi/proxy:ipc",
     "//ppapi/shared_impl",
   ]
 
   data_deps = []
 
   if (is_linux) {
@@ skipping 32 matching lines @@
     "//base",
     "//components/nacl/common",
     "//content/test:test_support",
     "//net:test_support",
   ]
 
   if (is_linux) {
     sources += [ "../zygote/nacl_fork_delegate_linux_unittest.cc" ]
   }
 }