Update from https://crrev.com/312398

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")
 
 static_library("dom4_keycode_converter") {
   sources = [
     "keycodes/dom4/keycode_converter.cc",
     "keycodes/dom4/keycode_converter.h",
     "keycodes/dom4/keycode_converter_data.h",
   ]
 
   deps = [
     "//base",
@@ skipping 271 matching lines @@
   if (use_x11) {
     configs += [ "//build/config/linux:x11" ]
     deps += [ "//ui/gfx/x" ]
   } else {
     sources -= [
       "platform/platform_event_builder_x_unittest.cc",
       "x/events_x_unittest.cc",
     ]
   }
 }