[iOS][Password-Breach] Reload table view on sign out

Update the table view in case the user is kicked out. Or logs out in
multi-window.

Bug: 986322
Change-Id: I45f1979bf27dfde6568fcaa525ab7443161342c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1856078
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705077}

ios/chrome/browser/ui/settings/password/passwords_table_view_controller.mm

@@ -32,6 +32,7 @@
 #import "ios/chrome/browser/passwords/save_passwords_consumer.h"
 #import "ios/chrome/browser/signin/authentication_service.h"
 #include "ios/chrome/browser/signin/authentication_service_factory.h"
+#import "ios/chrome/browser/signin/chrome_identity_service_observer_bridge.h"
 #include "ios/chrome/browser/system_flags.h"
 #import "ios/chrome/browser/ui/settings/cells/settings_cells_constants.h"
 #import "ios/chrome/browser/ui/settings/cells/settings_switch_cell.h"
@@ -155,6 +156,7 @@ std::vector<std::unique_ptr<autofill::PasswordForm>> CopyOf(
 
 @interface PasswordsTableViewController () <
     BooleanObserver,
+    ChromeIdentityServiceObserver,
     PasswordDetailsTableViewControllerDelegate,
     PasswordExporterDelegate,
     PasswordExportActivityViewControllerDelegate,
@@ -192,6 +194,8 @@ std::vector<std::unique_ptr<autofill::PasswordForm>> CopyOf(
   password_manager::DuplicatesMap blacklistedPasswordDuplicates_;
   // The current Chrome browser state.
   ios::ChromeBrowserState* browserState_;
+  // Authentication Service Observer.
+  std::unique_ptr<ChromeIdentityServiceObserverBridge> identityServiceObserver_;
   // Object storing the time of the previous successful re-authentication.
   // This is meant to be used by the |ReauthenticationModule| for keeping
   // re-authentications valid for a certain time interval within the scope
@@ -260,6 +264,8 @@ std::vector<std::unique_ptr<autofill::PasswordForm>> CopyOf(
                      prefName:password_manager::prefs::
                                   kPasswordLeakDetectionEnabled];
       [passwordLeakCheckEnabled_ setObserver:self];
+      identityServiceObserver_.reset(
+          new ChromeIdentityServiceObserverBridge(self));
     }
     [self getLoginsFromPasswordStore];
     [self updateUIForEditState];
@@ -1314,4 +1320,14 @@ std::vector<std::unique_ptr<autofill::PasswordForm>> CopyOf(
   return _passwordExporter;
 }
 
+#pragma mark - ChromeIdentityServiceObserver
+
+- (void)identityListChanged {
+  [self reloadData];
+}
+
+- (void)chromeIdentityServiceWillBeDestroyed {
+  identityServiceObserver_.reset();
+}
+
 @end