Site Settings Desktop: Add Closure coverage for Protocol Handlers.

chrome/browser/resources/settings/site_settings/compiled_resources2.gyp

 # 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.
 {
   'targets': [
     {
       'target_name': 'add_site_dialog',
       'dependencies': [
         'site_settings_behavior',
       ],
@@ skipping 33 matching lines @@
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
         'cookie_info',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'cookie_info',
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
+      'target_name': 'protocol_handlers',
+      'dependencies': [
+        '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:web_ui_listener_behavior',
+        'site_settings_behavior',
+      ],
+      'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
+    },
+    {
       'target_name': 'site_data',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:web_ui_listener_behavior',
         'cookie_tree_node',
         'site_settings_behavior',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'site_data_details_dialog',
@@ skipping 82 matching lines @@
     {
       'target_name': 'website_usage_private_api',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(EXTERNS_GYP):chrome_send',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }