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

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

Index: chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm b/chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm
index f9a02b5fa2c33346d85f0f5a4537381f21ccd2e0..a7f00010108599f784b528da2934467c6f40c074 100644
--- a/chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm
+++ b/chrome/browser/ui/cocoa/passwords/passwords_bubble_browsertest.mm
@@ -112,3 +112,18 @@ IN_PROC_BROWSER_TEST_F(ManagePasswordsBubbleTest, TabChangeTogglesIcon) {
   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());
+}