Improve a11y state for ToggleButton.

ash/common/system/chromeos/network/network_list_md.cc

Index: ash/common/system/chromeos/network/network_list_md.cc
diff --git a/ash/common/system/chromeos/network/network_list_md.cc b/ash/common/system/chromeos/network/network_list_md.cc
index c5a5bfbb4cdda6c4bfd8d277d733274f08e20412..b52f3739e288f5f3305c579cc8ddcb188b006d8d 100644
--- a/ash/common/system/chromeos/network/network_list_md.cc
+++ b/ash/common/system/chromeos/network/network_list_md.cc
@@ -163,6 +163,8 @@ class NetworkListViewMd::WifiHeaderRowView : public views::View {
     container->AddChildView(join_);
 
     toggle_ = new views::ToggleButton(listener_);
+    toggle_->SetAccessibleName(
+        l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_ENABLE_WIFI));
     // TODO(varkha): Implement focus painter.
     toggle_->SetFocusForPlatform();
     container->AddChildView(toggle_);