[Chromoting] GetHostAttributes with tests

remoting/host/BUILD.gn

Index: remoting/host/BUILD.gn
diff --git a/remoting/host/BUILD.gn b/remoting/host/BUILD.gn
index d73c11c53ad867ca7fef8165560ed75be943122e..229772f152006b2f304c98cb36a0061b5575bdf2 100644
--- a/remoting/host/BUILD.gn
+++ b/remoting/host/BUILD.gn
@@ -132,6 +132,8 @@ static_library("host") {
     "desktop_session_proxy.h",
     "desktop_session_win.cc",
     "desktop_session_win.h",
+    "directx_attributes.cc",
+    "directx_attributes.h",
     "disconnect_window_chromeos.cc",
     "disconnect_window_linux.cc",
     "disconnect_window_mac.h",
@@ -145,6 +147,8 @@ static_library("host") {
     "gcd_state_updater.h",
     "heartbeat_sender.cc",
     "heartbeat_sender.h",
+    "host_attributes.cc",
+    "host_attributes.h",
     "host_change_notification_listener.cc",
     "host_change_notification_listener.h",
     "host_config.cc",
@@ -496,6 +500,7 @@ source_set("unit_tests") {
     "gcd_rest_client_unittest.cc",
     "gcd_state_updater_unittest.cc",
     "heartbeat_sender_unittest.cc",
+    "host_attributes_unittest.cc",
     "host_change_notification_listener_unittest.cc",
     "host_config_unittest.cc",
     "host_extension_session_manager_unittest.cc",