Allow building mojo_shell and non-graphical apps/services on a Mac

mojo/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/module_args/mojo.gni")
 import("//mojo/public/mojo.gni")
 
 group("mojo") {
   # Meta-target, don't link into production code.
   testonly = true
@@ skipping 33 matching lines @@
       "//mojo/nacl:mojo_nacl",
       "//mojo/nacl:mojo_nacl_tests",
     ]
   }
 }
 
 group("tests") {
   testonly = true
   deps = [
     "//mojo/common:mojo_common_unittests",
-    "//mojo/converters/surfaces/tests:mojo_surfaces_lib_unittests",
     "//mojo/edk/system:tests",
     "//mojo/edk/test:public_tests",
     "//mojo/dart/embedder/test:dart_unittests",
     "//mojo/public/cpp/bindings/tests:versioning_apptests",
     "//mojo/services/view_manager/public/cpp/tests:mojo_view_manager_lib_unittests",
     "//mojo/tests:mojo_task_tracker_perftests",
     "//mojo/tools:message_generator",
     "//mojo/gpu:apptests",
     "//mojo/services/files/public/c:apptests",
   ]
 
+  if (is_linux || is_android) {
+    deps += [ "//mojo/converters/surfaces/tests:mojo_surfaces_lib_unittests" ]
+  }
+
   # TODO(jamesr): We only support building V8 snapshot data on a linux host since it
   # needs a 32 bit toolchain and we don't have one configured for mac hosts.
   if (host_os == "linux") {
     deps += [ "//mojo/edk/js:tests" ]
   }
 
   if (mojo_use_prebuilt_network_service) {
     deps += [ "//mojo/public/tools:copy_network_service_apptests" ]
   }
 }