Add a chrome://webapks page.

chrome/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/buildflag_header.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/compiler/pgo/pgo.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
@@ skipping 1330 matching lines @@
     "//chrome/browser/resources:component_extension_resources",
     "//chrome/browser/resources:invalidations_resources",
     "//chrome/browser/resources:net_internals_resources",
     "//chrome/browser/resources:options_resources",
     "//chrome/browser/resources:password_manager_internals_resources",
     "//chrome/browser/resources:policy_resources",
     "//chrome/browser/resources:quota_internals_resources",
     "//chrome/browser/resources:settings_resources",
     "//chrome/browser/resources:task_scheduler_internals_resources",
     "//chrome/browser/resources:translate_internals_resources",
+    "//chrome/browser/resources:webapks_ui_resources",
   ]
 
   if (is_chromeos) {
     public_deps += [ "//chrome/browser/resources/chromeos/chromevox" ]
     public_deps += [ "//chrome/browser/resources/chromeos/select_to_speak" ]
   }
 
   if (enable_extensions) {
     public_deps +=
         [ "//chrome/browser/resources:sync_file_system_internals_resources" ]
@@ skipping 244 matching lines @@
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }