Remove retail mode.

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")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("ash.gyp") ],
@@ skipping 104 matching lines @@
       "host/ash_window_tree_host_ozone.cc",
     ]
   }
 }
 
 component("ash_with_content") {
   sources = [
     "content_support/ash_with_content_export.h",
     "content_support/gpu_support_impl.cc",
     "content_support/gpu_support_impl.h",
-    "screensaver/screensaver_view.cc",
-    "screensaver/screensaver_view.h",
     "keyboard_overlay/keyboard_overlay_delegate.cc",
     "keyboard_overlay/keyboard_overlay_delegate.h",
     "keyboard_overlay/keyboard_overlay_view.cc",
     "keyboard_overlay/keyboard_overlay_view.h",
   ]
 
   defines = [ "ASH_WITH_CONTENT_IMPLEMENTATION" ]
 
   public_deps = [
     ":ash",
@@ skipping 238 matching lines @@
     "//content/test:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/accessibility",
   ]
 
   if (is_chromeos) {
     deps += [ "//ui/display" ]
   }
 }