ios: Cleanup class/struct forward declarations

ios/chrome/browser/passwords/password_controller.h

 // Copyright 2012 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.
 #ifndef IOS_CHROME_BROWSER_PASSWORDS_PASSWORD_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_PASSWORDS_PASSWORD_CONTROLLER_H_
 
 #import <Foundation/NSObject.h>
 
 #include <memory>
 
 #import "ios/chrome/browser/autofill/form_suggestion_provider.h"
 #import "ios/chrome/browser/passwords/ios_chrome_password_manager_client.h"
 #import "ios/chrome/browser/passwords/ios_chrome_password_manager_driver.h"
 #import "ios/web/public/web_state/web_state_observer_bridge.h"
 
 @protocol FormInputAccessoryViewProvider;
 @protocol PasswordsUiDelegate;
 @class PasswordGenerationAgent;
 
 namespace password_manager {
 class PasswordGenerationManager;
-class PasswordManager;
 class PasswordManagerClient;
 class PasswordManagerDriver;
 }  // namespace password_manager
 
 // Per-tab password controller. Handles password autofill and saving.
 @interface PasswordController : NSObject<CRWWebStateObserver,
                                          PasswordManagerClientDelegate,
                                          PasswordManagerDriverDelegate>
 
 // An object that can provide suggestions from this PasswordController.
@@ skipping 35 matching lines @@
 // Uses JavaScript to find password forms using the |webState_| and fills
 // them with the |username| and |password|. |completionHandler|, if not nil,
 // is called once per form filled.
 - (void)findAndFillPasswordForms:(NSString*)username
                         password:(NSString*)password
                completionHandler:(void (^)(BOOL))completionHandler;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PASSWORDS_PASSWORD_CONTROLLER_H_