[Chromoting] Refactor the host policy watcher so that policies can easily be added.

remoting/remoting.gyp

 # Copyright (c) 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.
 
 {
   'variables': {
     # TODO(dmaclach): can we pick this up some other way? Right now it's
     # duplicated from chrome.gyp
     'chromium_code': 1,
     # Use consistent strings across all platforms. Note that the plugin name
@@ skipping 1678 matching lines @@
         'host/client_session_unittest.cc',
         'host/differ_block_unittest.cc',
         'host/differ_unittest.cc',
         'host/heartbeat_sender_unittest.cc',
         'host/host_key_pair_unittest.cc',
         'host/host_mock_objects.cc',
         'host/host_mock_objects.h',
         'host/json_host_config_unittest.cc',
         'host/log_to_server_unittest.cc',
         'host/pin_hash_unittest.cc',
+        'host/policy_hack/fake_nat_policy.cc',
+        'host/policy_hack/fake_nat_policy.h',
+        'host/policy_hack/mock_policy_callback.cc',
+        'host/policy_hack/mock_policy_callback.h',
+        'host/policy_hack/nat_policy_unittest.cc',
         'host/register_support_host_request_unittest.cc',
         'host/remote_input_filter_unittest.cc',
         'host/screen_recorder_unittest.cc',
         'host/server_log_entry_unittest.cc',
         'host/test_key_pair.h',
         'host/video_frame_capturer_helper_unittest.cc',
         'host/video_frame_capturer_mac_unittest.cc',
         'host/video_frame_capturer_unittest.cc',
         'jingle_glue/fake_signal_strategy.cc',
         'jingle_glue/fake_signal_strategy.h',
@@ skipping 63 matching lines @@
                   '../base/allocator/allocator.gyp:allocator',
                 ],
               },
             ],
           ],
         }],
       ],  # end of 'conditions'
     },  # end of target 'remoting_unittests'
   ],  # end of targets
 }