Close the save card bubble on tab switch.

chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc

Index: chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc
diff --git a/chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc b/chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc
index 43e99aee6538a211de858bfcbc997b64fd0dd302..951d0599fe9ecf80c1231e752fdbe17d27597e5a 100644
--- a/chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc
+++ b/chrome/browser/ui/autofill/save_card_bubble_controller_impl.cc
@@ -209,6 +209,13 @@ void SaveCardBubbleControllerImpl::ReshowBubble() {
   ShowBubble();
 }
 
+void SaveCardBubbleControllerImpl::HideBubble() {
+  if (save_card_bubble_view_) {
+    save_card_bubble_view_->Hide();
+    save_card_bubble_view_ = nullptr;
+  }
+}
+
 bool SaveCardBubbleControllerImpl::IsIconVisible() const {
   return !save_card_callback_.is_null();
 }