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 ac31f8b2089429c3916f432a895b6491bd50730c..49e044c791d24d7edb7d92648911664793723c90 100644
--- a/remoting/remoting.gyp
+++ b/remoting/remoting.gyp
@@ -309,6 +309,8 @@
         '../third_party/npapi/npapi.gyp:npapi',
       ],
       'sources': [
+        'host/it2me_host_user_interface.cc',
+        'host/it2me_host_user_interface.h',
         'host/plugin/host_log_handler.cc',
         'host/plugin/host_log_handler.h',
         'host/plugin/host_plugin.cc',
@@ -687,6 +689,8 @@
         'host/disconnect_window_mac.h',
         'host/disconnect_window_mac.mm',
         'host/disconnect_window_win.cc',
+        'host/it2me_host_user_interface.cc',
+        'host/it2me_host_user_interface.h',
         'host/simple_host_process.cc',
         '../base/test/mock_chrome_application_mac.mm',
         '../base/test/mock_chrome_application_mac.h',
@@ -940,6 +944,8 @@
         'host/host_key_pair_unittest.cc',
         'host/host_mock_objects.cc',
         'host/host_mock_objects.h',
+        'host/it2me_host_user_interface.cc',
+        'host/it2me_host_user_interface.h',
         'host/json_host_config_unittest.cc',
         'host/log_to_server_unittest.cc',
         'host/register_support_host_request_unittest.cc',