Add 2x icons resources to mash.

ash/mus/BUILD.gn

 # Copyright 2015 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("//mojo/public/tools/bindings/mojom.gni")
 import("//services/shell/public/cpp/service.gni")
 import("//services/shell/public/service_manifest.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 131 matching lines @@
 service("mus") {
   output_name = "ash"
 
   sources = [
     "main.cc",
   ]
 
   deps = [
     ":lib",
     ":resources",
+    ":resources_200",
     "//services/shell/public/cpp",
   ]
 
   # TODO(beng): This target relies on //mash/session, but there is a cycle so we
   #             can't state that dependency here.
   data_deps = [
     ":manifest",
     "//services/ui",
   ]
 
-  resources = [ "$root_out_dir/ash_mus_resources.pak" ]
+  resources = [
+    "$root_out_dir/ash_mus_resources.pak",
+    "$root_out_dir/ash_mus_resources_200.pak",
+  ]
 }
 
 service_manifest("manifest") {
   name = "ash"
   source = "manifest.json"
 }
 
-# TODO: Load resources at additional scales and load locale-specific strings.
+# TODO: Load locale-specific strings.
 # TODO: Avoid duplication between Mash and Chrome pak files: crbug.com/628715.
 repack("resources") {
   output = "$root_out_dir/ash_mus_resources.pak"
   sources = [
     "$root_gen_dir/ash/common/strings/ash_strings_en-US.pak",
     "$root_gen_dir/ash/resources/ash_resources_100_percent.pak",
     "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
     "$root_gen_dir/ui/strings/app_locale_settings_en-US.pak",
     "$root_gen_dir/ui/strings/ui_strings_en-US.pak",
     "$root_gen_dir/ui/views/resources/views_resources_100_percent.pak",
   ]
   deps = [
     "//ash/common/strings",
     "//ash/resources",
     "//ui/resources",
     "//ui/strings",
     "//ui/views/mus:resources",
     "//ui/views/resources",
   ]
 }
 
+repack("resources_200") {
+  output = "$root_out_dir/ash_mus_resources_200.pak"
+  sources = [
+    "$root_gen_dir/ash/resources/ash_resources_200_percent.pak",
+    "$root_gen_dir/ui/resources/ui_resources_200_percent.pak",
+    "$root_gen_dir/ui/views/resources/views_resources_200_percent.pak",
+  ]
+  deps = [
+    "//ash/resources",
+    "//ui/resources",
+    "//ui/views/resources",
+  ]
+}
+
 source_set("unittests") {
   testonly = true
 
   sources = [
     "accelerators/accelerator_controller_registrar_test_api.cc",
     "accelerators/accelerator_controller_registrar_test_api.h",
     "accelerators/accelerator_controller_unittest.cc",
     "accelerators/accelerator_registrar_unittest.cc",
     "app_launch_unittest.cc",
     "bridge/wm_shell_mus_test_api.h",
@@ skipping 41 matching lines @@
     "//ui/views/mus",
   ]
 
   data_deps = [
     ":mus",
     "//mash/quick_launch",
   ]
 
   defines = [ "NOTIMPLEMENTED_POLICY=5" ]
 }