Close the save card bubble on tab switch.

chrome/browser/ui/views/autofill/save_card_icon_view.h

Index: chrome/browser/ui/views/autofill/save_card_icon_view.h
diff --git a/chrome/browser/ui/views/autofill/save_card_icon_view.h b/chrome/browser/ui/views/autofill/save_card_icon_view.h
index f591420faba5724cef50a760d4fb31e6b10aec4a..955819c840bcb4e217c9923546dc317d0637dae9 100644
--- a/chrome/browser/ui/views/autofill/save_card_icon_view.h
+++ b/chrome/browser/ui/views/autofill/save_card_icon_view.h
@@ -13,6 +13,8 @@ class CommandUpdater;
 
 namespace autofill {
 
+class SaveCardBubbleControllerImpl;
+
 // The location bar icon to show the Save Credit Card bubble where the user can
 // choose to save the credit card info to use again later without re-entering
 // it.
@@ -24,10 +26,13 @@ class SaveCardIconView : public BubbleIconView {
  protected:
   // BubbleIconView:
   void OnExecuting(BubbleIconView::ExecuteSource execute_source) override;
+  bool OnMousePressed(const ui::MouseEvent& event) override;
   views::BubbleDelegateView* GetBubble() const override;
   gfx::VectorIconId GetVectorIcon() const override;
 
  private:
+  SaveCardBubbleControllerImpl* GetController() const;
+
   // May be nullptr.
   Browser* browser_;