tabing inconsistencies between trays in status area

ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc

Index: ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc
diff --git a/ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc b/ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc
index 5d56f12c3896ff677a9a7799e89ca7ecbbcec056..43ff5aeedd0b7061e6d79e74eff99b07f510013b 100644
--- a/ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc
+++ b/ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc
@@ -45,6 +45,7 @@ VirtualKeyboardTray::VirtualKeyboardTray(StatusAreaWidget* status_area_widget)
                              views::ImageButton::ALIGN_MIDDLE);
 
   tray_container()->AddChildView(button_);
+  button_->SetFocusBehavior(FocusBehavior::NEVER);
   SetContentsBackground();
   // The Shell may not exist in some unit tests.
   if (Shell::HasInstance())