Add a chrome://webapks page.

chrome/chrome_paks.gni

 # Copyright 2016 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/locales.gni")
 import("//chrome/common/features.gni")
 import("//extensions/features/features.gni")
 import("//ui/base/ui_features.gni")
 import("chrome_repack_locales.gni")
 
@@ skipping 150 matching lines @@
       sources += [ "$root_gen_dir/headless/headless_lib_resources.pak" ]
       deps += [ "//headless:resources" ]
     }
     if (enable_extensions) {
       sources += [
         "$root_gen_dir/extensions/extensions_renderer_resources.pak",
         "$root_gen_dir/extensions/extensions_resources.pak",
       ]
       deps += [ "//extensions:extensions_resources" ]
     }
+    if (is_android) {
+      sources += [ "$root_gen_dir/chrome/webapks_ui_resources.pak" ]
+      deps += [ "//chrome/browser/resources:webapks_ui_resources" ]
+    }
   }
 }
 
 # Defines repack() targets used by Chrome. Specifically:
 # * chrome_100_percent.pak
 # * chrome_200_percent.pak (optionally)
 # * resources.pak
 # * locale .pak files
 #
 # Paramters:
@@ skipping 81 matching lines @@
       ":${target_name}_locales",
     ]
     if (enable_hidpi) {
       public_deps += [ ":${target_name}_200_percent" ]
     }
     if (defined(invoker.public_deps)) {
       public_deps += invoker.public_deps
     }
   }
 }