Refresh the password bubble if it's open when the second request comes in.

chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm

 // Copyright 2014 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/mac/foundation_util.h"
 #include "base/mac/scoped_objc_class_swizzler.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
@@ skipping 94 matching lines @@
   // Open a new tab.
   int firstTab = browser()->tab_strip_model()->active_index();
   AddTabAtIndex(
       firstTab + 1, GURL("http://foo.bar/"), ui::PAGE_TRANSITION_TYPED);
   EXPECT_FALSE(decoration()->IsVisible());
 
   // Switch back to the previous tab.
   browser()->tab_strip_model()->ActivateTabAt(firstTab, true);
   EXPECT_TRUE(decoration()->IsVisible());
 }
+
+IN_PROC_BROWSER_TEST_F(ManagePasswordsBubbleTest, DoubleOpenBubble) {
+  // Open the bubble first.
+  DoWithSwizzledNSWindow(^{ SetupPendingPassword(); });
+  base::scoped_nsobject<ManagePasswordsBubbleController> bubble_controller(
+      [controller() retain]);
+  EXPECT_TRUE(bubble_controller);
+  EXPECT_TRUE(view()->active());
+
+  // Open the bubble again, the first one should be replaced.
+  DoWithSwizzledNSWindow(^{ SetupPendingPassword(); });
+  EXPECT_NSNE(bubble_controller, controller());
+  EXPECT_TRUE(controller());
+  EXPECT_TRUE(view()->active());
+}