Close the save card bubble on tab switch.

chrome/browser/ui/cocoa/autofill/save_card_bubble_view_unittest.mm

 // 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.
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/autofill/save_card_bubble_controller.h"
 #import "chrome/browser/ui/cocoa/autofill/save_card_bubble_view_bridge.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace autofill {
 
 namespace {
 
 class TestSaveCardBubbleController : public SaveCardBubbleController {
  public:
   static scoped_ptr<TestSaveCardBubbleController> CreateForTesting() {
     return scoped_ptr<TestSaveCardBubbleController>(
         new TestSaveCardBubbleController());
   }
 
   // SaveCardBubbleController:
   base::string16 GetWindowTitle() const override { return base::string16(); }
 
   base::string16 GetExplanatoryMessage() const override {
     return base::string16();
   }
 
+  void HideBubble() override {}
   void OnSaveButton() override {}
   void OnCancelButton() override {}
   void OnLearnMoreClicked() override {}
   void OnLegalMessageLinkClicked(const GURL& url) override {}
   void OnBubbleClosed() override {}
 
   const LegalMessageLines& GetLegalMessageLines() const override {
     return *lines_;
   }
 
@@ skipping 34 matching lines @@
   // This will show the SaveCardBubbleViewCocoa.
   SaveCardBubbleViewBridge* bridge = new SaveCardBubbleViewBridge(
       bubble_controller.get(), browser_window_controller_);
 
   // This sends -close to the SaveCardBubbleViewCocoa, and causes bridge to
   // delete itself.
   bridge->Hide();
 }
 
 }  // namespace autofill