Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/passwords/passwords_ui_delegate_impl.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.
+
+#import "ios/chrome/browser/passwords/passwords_ui_delegate_impl.h"
+
+#import "ios/chrome/browser/passwords/password_generation_prompt_view.h"
+#import "ios/chrome/browser/passwords/password_generation_prompt_view_controller.h"
+
+@implementation PasswordsUiDelegateImpl
+
+#pragma mark -
+#pragma mark PasswordsUiDelegate
+
+- (void)showGenerationAlertWithPassword:(NSString*)password
+                      andPromptDelegate:
+                          (id<PasswordGenerationPromptDelegate>)delegate {
+  UIViewController* topViewController =
+      [[[UIApplication sharedApplication] keyWindow] rootViewController];
+
+  // Look for the top-most presented ViewController.
+  for (UIViewController* controller = topViewController.presentedViewController;
+       controller && ![controller isBeingDismissed];
+       controller = controller.presentedViewController) {
+    // Return if a PasswordGenerationPromptViewController is already presented.
+    if ([controller
+            isKindOfClass:[PasswordGenerationPromptViewController class]])
+      return;
+
+    topViewController = controller;
+  }
+
+  PasswordGenerationPromptDialog* contentView =
+      [[[PasswordGenerationPromptDialog alloc]
+          initWithDelegate:delegate
+            viewController:topViewController] autorelease];
+
+  UIViewController* viewController =
+      [[[PasswordGenerationPromptViewController alloc]
+          initWithPassword:password
+               contentView:contentView
+            viewController:topViewController] autorelease];
+
+  [topViewController presentViewController:viewController
+                                  animated:YES
+                                completion:nil];
+}
+
+- (void)hideGenerationAlert {
+  UIViewController* rootViewController =
+      [[[UIApplication sharedApplication] keyWindow] rootViewController];
+
+  // Check every presented ViewController for a password generation prompt.
+  for (UIViewController* controller = rootViewController;
+       controller && ![controller isBeingDismissed];
+       controller = controller.presentedViewController) {
+    if ([controller.presentedViewController
+            isKindOfClass:[PasswordGenerationPromptViewController class]]) {
+      // Dismiss the password prompt.
+      [controller dismissViewControllerAnimated:NO completion:nil];
+      return;
+    }
+  }
+}
+
+@end