Close the save card bubble on tab switch.

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

Index: chrome/browser/ui/views/autofill/save_card_bubble_views.h
diff --git a/chrome/browser/ui/views/autofill/save_card_bubble_views.h b/chrome/browser/ui/views/autofill/save_card_bubble_views.h
index 62d6973370f0085d809c4d08c8fe6636714b7b2b..a540515084338662857f5642f2c8bf83c55c739f 100644
--- a/chrome/browser/ui/views/autofill/save_card_bubble_views.h
+++ b/chrome/browser/ui/views/autofill/save_card_bubble_views.h
@@ -41,6 +41,9 @@ class SaveCardBubbleViews : public SaveCardBubbleView,
 
   void Show(DisplayReason reason);
 
+  // Closes the currently shown bubble if one exists.
+  static void CloseBubble();

[Justin Donnelly, 2016/01/07 19:28:12]

The static method is unfortunate given the otherwise nice design of the save
card bubble controller and view but it's how the other bubbles handle this and I
can't find another approach that implements all of the desired behaviors.

I'm open to other suggestions if you have any.

+
   // SaveCardBubbleView
   void Hide() override;
 
@@ -70,6 +73,8 @@ class SaveCardBubbleViews : public SaveCardBubbleView,
   // views::BubbleDelegateView
   void Init() override;
 
+  static SaveCardBubbleViews* save_card_bubble_view_;
+
   SaveCardBubbleController* controller_;  // Weak reference.
 
   // Button for the user to confirm saving the credit card info.