mustash: Enable connections to mus from the Chrome renderer [take 2]

content/renderer/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("//content/renderer/renderer.gni")
 import("//media/media_options.gni")
 
 source_set("renderer") {
   # Only the public target should depend on this. All other targets (even
   # internal content ones) should depend on the public one.
   visibility = [ "//content/public/renderer:renderer_sources" ]
 
   sources = rebase_path(content_renderer_gypi_values.private_renderer_sources,
                         ".",
                         "//content")
 
   configs += [
     "//content:content_implementation",
     "//build/config/compiler:no_size_t_to_int_warning",
+    "//content/public/common:mojo_shell_client",
   ]
 
   deps = [
     # TODO(GYP) bug 376846 remove this. This should be inherited from //net but
     # those don't cross component boundaries.
     "//base/allocator",
     "//cc",
     "//cc/blink",
     "//cc/proto",
     "//components/scheduler:scheduler",
@@ skipping 34 matching lines @@
     "//ui/accessibility",
     "//ui/base",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/gl",
     "//ui/native_theme",
     "//ui/surface",
     "//v8",
   ]
 
+  if (use_aura) {
+    sources += [
+      "render_widget_mus_connection.cc",
+      "render_widget_mus_connection.h",
+      "render_widget_window_tree_client_factory.cc",
+      "render_widget_window_tree_client_factory.h",
+    ]
+  }
+
   if (is_mac) {
     sources -= [
       "webscrollbarbehavior_impl_gtkoraura.cc",
       "webscrollbarbehavior_impl_gtkoraura.h",
     ]
     sources += [
       "external_popup_menu.cc",
       "external_popup_menu.h",
     ]
   }
@@ skipping 137 matching lines @@
 
   if (enable_webvr) {
     sources += [
       "vr/vr_dispatcher.cc",
       "vr/vr_dispatcher.h",
       "vr/vr_type_converters.cc",
       "vr/vr_type_converters.h",
     ]
   }
 }