Move remoting::GetUsername() from remoting/base to remoting/host

remoting/remoting.gyp

Index: remoting/remoting.gyp
diff --git a/remoting/remoting.gyp b/remoting/remoting.gyp
index 44315d1a6d6bbc68989b84ba4fbb52c3133cf948..ae025ae52a335b015cdca82fb73904b47e09b563 100644
--- a/remoting/remoting.gyp
+++ b/remoting/remoting.gyp
@@ -343,18 +343,18 @@
             'host/dns_blackhole_checker.h',
             'host/heartbeat_sender.cc',
             'host/heartbeat_sender.h',
-            'host/host_status_sender.cc',
-            'host/host_status_sender.h',
             'host/host_change_notification_listener.cc',
             'host/host_change_notification_listener.h',
             'host/host_config.cc',
             'host/host_config.h',
-            'host/host_exit_codes.h',
             'host/host_exit_codes.cc',
+            'host/host_exit_codes.h',
             'host/host_secret.cc',
             'host/host_secret.h',
             'host/host_status_monitor.h',
             'host/host_status_observer.h',
+            'host/host_status_sender.cc',
+            'host/host_status_sender.h',
             'host/host_window.h',
             'host/host_window_proxy.cc',
             'host/host_window_proxy.h',
@@ -441,6 +441,8 @@
             'host/usage_stats_consent.h',
             'host/usage_stats_consent_mac.cc',
             'host/usage_stats_consent_win.cc',
+            'host/username.cc',
+            'host/username.h',
             'host/video_scheduler.cc',
             'host/video_scheduler.h',
             'host/win/com_security.cc',