Add UMA histograms for policy loading.

chrome/chrome_browser.gypi

 # Copyright 2012 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': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1283 matching lines @@
         'browser/policy/configuration_policy_pref_store.cc',
         'browser/policy/configuration_policy_pref_store.h',
         'browser/policy/configuration_policy_provider.cc',
         'browser/policy/configuration_policy_provider.h',
         'browser/policy/managed_mode_policy_provider.cc',
         'browser/policy/managed_mode_policy_provider.h',
         'browser/policy/policy_bundle.cc',
         'browser/policy/policy_bundle.h',
         'browser/policy/policy_error_map.cc',
         'browser/policy/policy_error_map.h',
+        'browser/policy/policy_load_status.cc',
+        'browser/policy/policy_load_status.h',
         'browser/policy/policy_loader_mac.cc',
         'browser/policy/policy_loader_mac.h',
         'browser/policy/policy_loader_win.cc',
         'browser/policy/policy_loader_win.h',
         'browser/policy/policy_map.cc',
         'browser/policy/policy_map.h',
         'browser/policy/policy_path_parser.h',
         'browser/policy/policy_path_parser_linux.cc',
         'browser/policy/policy_path_parser_mac.mm',
         'browser/policy/policy_path_parser_win.cc',
@@ skipping 1700 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }