Delete TestDisplaySnapshot and update tests.

ash/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 1149 matching lines @@
     deps += [
       "//chromeos",
       "//chromeos:power_manager_proto",
       "//chromeos:test_support_without_gmock",
       "//components/quirks",
       "//device/bluetooth",
       "//net:net",
       "//ui/chromeos",
       "//ui/display",
       "//ui/display:test_support",
-      "//ui/display:test_util",
     ]
   }
 }
 
 test("ash_unittests") {
   sources = [
     "accelerators/accelerator_commands_unittest.cc",
     "accelerators/accelerator_controller_unittest.cc",
     "accelerators/accelerator_filter_unittest.cc",
     "accelerators/magnifier_key_scroller_unittest.cc",
@@ skipping 220 matching lines @@
     deps += [
       "//chromeos",
       "//chromeos:power_manager_proto",
       "//chromeos:test_support_without_gmock",
       "//components/quirks",
       "//device/bluetooth",
       "//net:net",
       "//ui/chromeos",
       "//ui/display",
       "//ui/display:test_support",
-      "//ui/display:test_util",
     ]
   } else {
     sources -= [
       "accelerators/magnifier_key_scroller_unittest.cc",
       "accelerators/spoken_feedback_toggler_unittest.cc",
 
       # Can't resize on Windows Ash. http://crbug.com/165962
       "autoclick/autoclick_unittest.cc",
       "display/resolution_notification_controller_unittest.cc",
 
@@ skipping 51 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }