Rename "test" ozone platform to "headless"

ui/ozone/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("//ui/ozone/ozone.gni")
 import("//testing/test.gni")
 
 # The list of platforms that will be built.
 ozone_platforms = []
 
@@ skipping 22 matching lines @@
   ozone_platforms += [ "gbm" ]
   ozone_platform_deps += [ "platform/drm:gbm" ]
   ozone_platform_test_deps += [ "platform/drm:gbm_unittests" ]
 }
 
 if (ozone_platform_cast) {
   ozone_platforms += [ "cast" ]
   ozone_platform_deps += [ "platform/cast" ]
 }
 
+if (ozone_platform_headless) {
+  ozone_platforms += [ "headless" ]
+  ozone_platform_deps += [ "platform/headless" ]
+}
+
 platform_list_cc_file = "$target_gen_dir/platform_list.cc"
 platform_list_h_file = "$target_gen_dir/platform_list.h"
 platform_list_txt_file = "$target_gen_dir/platform_list.txt"
 constructor_list_cc_file = "$target_gen_dir/constructor_list.cc"
 
 config("vgem_map") {
   if (use_vgem_map) {
     defines = [ "USE_VGEM_MAP" ]
   }
 }
@@ skipping 71 matching lines @@
       [
         ":generate_constructor_list",
         ":generate_ozone_platform_list",
         ":ozone_base",
         "//base",
         "//ipc",
         "//skia",
         "//ui/display/types",
         "//ui/display/util",
         "//ui/events",
+        "//ui/events/devices",
         "//ui/events/ozone:events_ozone",
         "//ui/gfx",
         "//ui/gfx/geometry",
         "//ui/gfx/ipc",
 
         # TODO(GYP) the GYP version has a way to add additional dependencies via
         # build flags.
       ] + ozone_platform_deps
 }
 
@@ skipping 45 matching lines @@
   sources = [
     "run_all_unittests.cc",
   ]
 
   deps = [
            "//base/test:test_support",
            "//testing/gtest",
            "//ui/gfx/geometry",
          ] + ozone_platform_test_deps
 }