LabelButton: Set the label's disabled status to match that of the button

ui/views/controls/button/label_button.cc

Index: ui/views/controls/button/label_button.cc
diff --git a/ui/views/controls/button/label_button.cc b/ui/views/controls/button/label_button.cc
index 047b85a5396f3a2fb84cca2f0ebfc79f1c31af21..8cf32f3e0fb8596415e759220ccc3f17644d98e8 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -153,6 +153,7 @@ void LabelButton::StateChanged() {
   const SkColor color = button_state_colors_[state()];
   if (state() != STATE_DISABLED && label_->enabled_color() != color)
     label_->SetEnabledColor(color);
+  label_->SetEnabled(state() != STATE_DISABLED);
   if (image_->GetPreferredSize() != previous_image_size)
     Layout();
 }