Define MOJO_SHELL_CLIENT uniformly across content

content/utility/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("//content/utility/utility.gni")
 import("//media/media_options.gni")
 
 source_set("utility") {
   # Only the public target should depend on this. All other targets (even
   # internal content ones) should depend on the public one.
   visibility = [ "//content/public/utility:utility_sources" ]
 
   sources =
       rebase_path(content_utility_gypi_values.utility_sources, ".", "//content")
 
-  configs += [ "//content:content_implementation" ]
+  configs += [
+    "//content:content_implementation",
+    "//content/public/common:mojo_shell_client",
+  ]
 
   deps = [
     "//base",
     "//content:export",
     "//content/public/child:child_sources",
     "//content/public/common:common_sources",
     "//content/public/common:mojo_bindings",
     "//courgette:courgette_lib",
     "//mojo/application/public/cpp:cpp_for_chromium",
     "//mojo/application/public/interfaces",
     "//mojo/common",
     "//mojo/public/cpp/bindings",
     "//mojo/shell",
     "//third_party/WebKit/public:blink_headers",
     "//url",
   ]
 
   if (enable_mojo_media == "utility") {
     deps += [ "//media/mojo/services:application" ]
   }
 }