Define MOJO_SHELL_CLIENT uniformly across content

content/common/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/common/common.gni")
 import("//media/media_options.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 if (is_mac) {
@@ skipping 191 matching lines @@
       "//mojo/environment:chromium",
       "//sandbox",
       "//storage/common",
       "//third_party/WebKit/public:blink",
       "//third_party/mojo/src/mojo/edk/system",
       "//ui/gl",
       ":mojo_bindings",
     ]
   }
 
-  defines = [ "MOJO_SHELL_CLIENT" ]
+  defines = []
   include_dirs = []
   libs = []
   ldflags = []
 
   if (is_android && use_seccomp_bpf) {
     set_sources_assignment_filter([])
     sources += [
       "sandbox_linux/sandbox_bpf_base_policy_linux.cc",
       "sandbox_linux/sandbox_bpf_base_policy_linux.h",
     ]
@@ skipping 319 matching lines @@
 
   import_dirs = [ "//mojo/services" ]
 
   deps = [
     "//content/public/common:mojo_bindings",
     "//mojo/application/public/interfaces",
     "//skia/public/interfaces",
     "//ui/mojo/geometry:interfaces",
   ]
 }