Remove MOJO_SHELL_CLIENT define.

chrome/browser/ui/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
 
@@ skipping 367 matching lines @@
         rebase_path(gypi_values.chrome_browser_ui_aura_sources, ".", "//chrome")
     deps += [
       # aura uses some of ash resources.
       "//ash/resources",
       "//ui/aura",
       "//ui/keyboard",
       "//ui/keyboard:keyboard_with_content",
       "//ui/keyboard:resources",
       "//ui/wm",
     ]
-    defines += [ "MOJO_SHELL_CLIENT" ]
     if (!is_chromeos) {
       sources += rebase_path(gypi_values.chrome_browser_ui_aura_non_chromeos,
                              ".",
                              "//chrome")
     }
   }
   if (ui_compositor_image_transport) {
     deps += [ "//ui/gl" ]
   }
   if (use_nss_certs) {
@@ skipping 311 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }