Move the test template to //testing/test.gni (part 2)

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/rules.gni")
 
 static_library("dom4_keycode_converter") {
   sources = [
     "keycodes/dom3/dom_code.h",
     "keycodes/dom3/dom_key.h",
     "keycodes/dom3/dom_key_data.h",
     "keycodes/dom4/keycode_converter.cc",
     "keycodes/dom4/keycode_converter.h",
     "keycodes/dom4/keycode_converter_data.h",
   ]
@@ skipping 322 matching lines @@
       "//ui/events/ozone:events_ozone",
       "//ui/events/ozone:events_ozone_evdev",
       "//ui/events/ozone:events_ozone_layout",
     ]
   }
 
   if (use_aura) {
     sources += [ "gestures/gesture_provider_aura_unittest.cc" ]
   }
 }