Close the password bubble when navigating between tabs.

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

Index: chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_cocoa.mm b/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_cocoa.mm
index 4c46675ddbca2142dbc27b54e7680374717c6ed3..cbc37d665baa207d7df3a79c949c079fbc9ed45d 100644
--- a/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_cocoa.mm
+++ b/chrome/browser/ui/cocoa/passwords/manage_passwords_bubble_cocoa.mm
@@ -64,6 +64,10 @@ void ShowManagePasswordsBubble(content::WebContents* webContents) {
           : ManagePasswordsBubble::USER_ACTION,
       [bwc locationBarBridge]->manage_passwords_decoration()->icon());
 }
+
+void CloseManagePasswordsBubble(content::WebContents* web_contents) {
+  // The bubble is closed when it loses the focus.
+}
 }  // namespace chrome
 
 ManagePasswordsBubbleCocoa::ManagePasswordsBubbleCocoa(