Close the save card bubble on tab switch.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_AUTOFILL_SAVE_CARD_ICON_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_AUTOFILL_SAVE_CARD_ICON_VIEW_H_
 
 #include "base/macros.h"
+#include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/views/location_bar/bubble_icon_view.h"
 
 class Browser;
 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.
-class SaveCardIconView : public BubbleIconView {
+class SaveCardIconView : public BubbleIconView, public TabStripModelObserver {
  public:
   explicit SaveCardIconView(CommandUpdater* command_updater, Browser* browser);
   ~SaveCardIconView() override;
 
  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;
 
+  // TabStripModelObserver:
+  void TabDeactivated(content::WebContents* contents) override;
+
  private:
+  SaveCardBubbleControllerImpl* GetController() const;
+
   // May be nullptr.
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(SaveCardIconView);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_SAVE_CARD_ICON_VIEW_H_