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 80 matching lines @@
       "$root_gen_dir/blink/public/resources/blink_resources.pak",
       "$root_gen_dir/chrome/browser_resources.pak",
       "$root_gen_dir/chrome/chrome_unscaled_resources.pak",
       "$root_gen_dir/chrome/common_resources.pak",
       "$root_gen_dir/chrome/invalidations_resources.pak",
       "$root_gen_dir/chrome/net_internals_resources.pak",
       "$root_gen_dir/chrome/password_manager_internals_resources.pak",
       "$root_gen_dir/chrome/policy_resources.pak",
       "$root_gen_dir/chrome/task_scheduler_internals_resources.pak",
       "$root_gen_dir/chrome/translate_internals_resources.pak",
+      "$root_gen_dir/chrome/webapks_ui_resources.pak",

[Dan Beam, 2017/01/27 21:52:15]

i think you only want to add these on android, right?

[gonzalon, 2017/01/27 22:45:03]

Done.

       "$root_gen_dir/components/components_resources.pak",
       "$root_gen_dir/content/browser/tracing/tracing_resources.pak",
       "$root_gen_dir/content/content_resources.pak",
       "$root_gen_dir/net/net_resources.pak",
       "$root_gen_dir/ui/resources/webui_resources.pak",
     ]
     deps = [
       "//chrome/app/theme:chrome_unscaled_resources",
       "//chrome/browser:resources",
       "//chrome/browser/resources:invalidations_resources",
       "//chrome/browser/resources:net_internals_resources",
       "//chrome/browser/resources:password_manager_internals_resources",
       "//chrome/browser/resources:policy_resources",
       "//chrome/browser/resources:task_scheduler_internals_resources",
       "//chrome/browser/resources:translate_internals_resources",
+      "//chrome/browser/resources:webapks_ui_resources",
       "//chrome/common:resources",
       "//components/resources",
       "//content:resources",
       "//content/browser/tracing:resources",
       "//net:net_resources",
       "//third_party/WebKit/public:resources",
       "//ui/resources",
     ]
     if (defined(invoker.deps)) {
       deps += invoker.deps
@@ skipping 136 matching lines @@
       ":${target_name}_locales",
     ]
     if (enable_hidpi) {
       public_deps += [ ":${target_name}_200_percent" ]
     }
     if (defined(invoker.public_deps)) {
       public_deps += invoker.public_deps
     }
   }
 }