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

ui/events/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/ui.gni")
 import("//testing/test.gni")
 import("//ui/events/xkb.gni")
 
 static_library("dom_keycode_converter") {
   sources = [
@@ skipping 239 matching lines @@
     ]
     deps += [
       "//ui/events/devices",
       "//ui/gfx/x",
     ]
   }
 }
 
 test("events_unittests") {
   sources = [
-    "cocoa/events_mac_unittest.mm",
     "devices/x11/device_data_manager_x11_unittest.cc",
     "event_dispatcher_unittest.cc",
     "event_processor_unittest.cc",
     "event_rewriter_unittest.cc",
     "event_unittest.cc",
     "gesture_detection/bitset_32_unittest.cc",
     "gesture_detection/filtered_gesture_provider_unittest.cc",
     "gesture_detection/gesture_event_data_packet_unittest.cc",
     "gesture_detection/gesture_provider_unittest.cc",
     "gesture_detection/motion_event_buffer_unittest.cc",
@@ skipping 64 matching lines @@
 if (is_nacl) {
   source_set("latency_info") {
     sources = [
       "ipc/latency_info_param_traits.cc",
       "ipc/latency_info_param_traits.h",
       "latency_info.cc",
       "latency_info.h",
     ]
   }
 }