Remove MOJO_SHELL_CLIENT define.

content/child/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/child/child.gni")
 
 if (is_component_build) {
   link_target_type = "source_set"
@@ skipping 16 matching lines @@
   ]
   if (is_android) {
     # See comment in content/app/BUILD.gn above content_app_deps.
     visibility += [ "//content/app:*" ]
   }
 
   sources = rebase_path(content_child_gypi_values.private_child_sources,
                         ".",
                         "//content")
 
-  configs += [
-    "//build/config:precompiled_headers",
-    "//content/public/common:mojo_shell_client",
-  ]
+  configs += [ "//build/config:precompiled_headers" ]
 
   public_deps = [
     "//gpu/ipc/client:client",
   ]
 
   deps = [
     "//base",
     "//components/mime_util",
     "//components/scheduler:scheduler",
     "//components/tracing",
@@ skipping 59 matching lines @@
 
 # See comment at the top of //content/BUILD.gn for how this works.
 group("for_content_tests") {
   visibility = [ "//content/test/*" ]
   if (!is_component_build) {
     public_deps = [
       ":child",
     ]
   }
 }