Add new chrome://proximity-auth WebUI for debugging Smart Lock.

components/proximity_auth.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'proximity_auth',
       'type': 'static_library',
       'include_dirs': [
@@ skipping 88 matching lines @@
         '../base/base.gyp:base',
       ],
       'sources': [
         "proximity_auth/cryptauth/fake_secure_message_delegate.cc",
         "proximity_auth/cryptauth/fake_secure_message_delegate.h",
       ],
       'export_dependent_settings': [
         'cryptauth_proto',
       ],
     },
+    {
+      # GN version: //components/proximity_auth/webui
+      'target_name': 'proximity_auth_webui',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../content/content.gyp:content_browser',
+        'components_resources.gyp:components_resources',
+        'proximity_auth',
+        'cryptauth',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'proximity_auth/webui/proximity_auth_ui.cc',
+        'proximity_auth/webui/proximity_auth_ui.h',
+        'proximity_auth/webui/proximity_auth_webui_handler.cc',
+        'proximity_auth/webui/proximity_auth_webui_handler.h',
+        'proximity_auth/webui/url_constants.cc',
+        'proximity_auth/webui/url_constants.h',
+      ],
+    },
   ],
 }