Add old_state parameter to CustomButton::StateChanged

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 c4bca07210a54f244931ef7e477b6625b6c213df..28242d0ba474901008eb4586374fe8280f0a1ef8 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -458,7 +458,7 @@ std::unique_ptr<views::InkDropHighlight> LabelButton::CreateInkDropHighlight()
                    gfx::RectF(image()->GetMirroredBounds()).CenterPoint());
 }
 
-void LabelButton::StateChanged() {
+void LabelButton::StateChanged(ButtonState old_state) {
   const gfx::Size previous_image_size(image_->GetPreferredSize());
   UpdateImage();
   ResetLabelEnabledColor();