Add WM_EVENT_TRUSTED_PIN and WINDOW_STATE_TYPE_TRUSTED_PINNED to Ash.

ash/metrics/user_metrics_recorder.cc

Index: ash/metrics/user_metrics_recorder.cc
diff --git a/ash/metrics/user_metrics_recorder.cc b/ash/metrics/user_metrics_recorder.cc
index 54290d68167ef5d543d80e712ce342b76e1c73e4..1149707a2a4b6ea647913d7595b79456393c8284 100644
--- a/ash/metrics/user_metrics_recorder.cc
+++ b/ash/metrics/user_metrics_recorder.cc
@@ -66,6 +66,7 @@ ActiveWindowStateType GetActiveWindowState() {
       case wm::WINDOW_STATE_TYPE_END:
       case wm::WINDOW_STATE_TYPE_AUTO_POSITIONED:
       case wm::WINDOW_STATE_TYPE_PINNED:
+      case wm::WINDOW_STATE_TYPE_TRUSTED_PINNED:
         // TODO: We probably want to recorde PINNED state.
         active_window_state_type = ACTIVE_WINDOW_STATE_TYPE_OTHER;
         break;