Refactor IT2Me-specific functions into a HostObserver subclass.

remoting/remoting.gyp

Index: remoting/remoting.gyp
diff --git a/remoting/remoting.gyp b/remoting/remoting.gyp
index de106f7e092781d6526f9365e5f95be117a2ecbc..43ae1bdedc95ab5c47289b52dc8dc74d3431b3af 100644
--- a/remoting/remoting.gyp
+++ b/remoting/remoting.gyp
@@ -284,6 +284,8 @@
         '../third_party/npapi/npapi.gyp:npapi',
       ],
       'sources': [
+        'host/it2me_observer.cc',
+        'host/it2me_observer.h',
         'host/plugin/host_log_handler.cc',
         'host/plugin/host_log_handler.h',
         'host/plugin/host_plugin.cc',
@@ -665,6 +667,8 @@
         'host/disconnect_window_mac.h',
         'host/disconnect_window_mac.mm',
         'host/disconnect_window_win.cc',
+        'host/it2me_observer.cc',
+        'host/it2me_observer.h',
         'host/simple_host_process.cc',
         '../base/test/mock_chrome_application_mac.mm',
         '../base/test/mock_chrome_application_mac.h',
@@ -910,6 +914,8 @@
         'host/host_key_pair_unittest.cc',
         'host/host_mock_objects.cc',
         'host/host_mock_objects.h',
+        'host/it2me_observer.cc',
+        'host/it2me_observer.h',
         'host/json_host_config_unittest.cc',
         'host/log_to_server_unittest.cc',
         'host/register_support_host_request_unittest.cc',