Add a chrome://webapks page.

third_party/closure_compiler/compiled_resources2.gyp

 # 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.
 #
 # Add your directory-specific .gyp file to this list for it to be continuously
 # typechecked on the builder:
 # http://build.chromium.org/p/chromium.fyi/builders/Closure%20Compilation%20Linux
 #
 # Also, see our guide to Closure compilation in chrome:
 # https://chromium.googlesource.com/chromium/src/+/master/docs/closure_compilation.md
@@ skipping 14 matching lines @@
         '<(DEPTH)/chrome/browser/resources/md_downloads/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/md_extensions/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/md_feedback/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/md_history/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/md_user_manager/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/media_router/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/offline_pages/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/settings/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/uber/compiled_resources2.gyp:*',
         '<(DEPTH)/chrome/browser/resources/vr_shell/compiled_resources2.gyp:*',
+        '<(DEPTH)/chrome/browser/resources/webapks/compiled_resources2.gyp:*',
         '<(DEPTH)/ui/file_manager/compiled_resources2.gyp:*',
         '<(DEPTH)/ui/webui/resources/cr_elements/compiled_resources2.gyp:*',
         '<(DEPTH)/ui/webui/resources/js/chromeos/compiled_resources2.gyp:*',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:*',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:*',
       ],
     },
   ]
 }