chrome: Cleanup class/struct forward declarations

chrome/browser/ui/cocoa/profiles/profile_signin_confirmation_view_controller.h

 // Copyright 2014 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 CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_VIEW_CONTROLLER_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_VIEW_CONTROLLER_
 
 #import <Cocoa/Cocoa.h>
 #include <string>
 
 #include "base/callback.h"
 #include "base/mac/scoped_nsobject.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_button.h"
 
 @class HyperlinkTextView;
 class Browser;
-class Profile;
 
 namespace ui {
 class ProfileSigninConfirmationDelegate;
 }
 
 @interface ProfileSigninConfirmationViewController
     : NSViewController<NSTextViewDelegate> {
  @private
   // The browser object for the sign-in tab.
   Browser* browser_;
@@ skipping 34 matching lines @@
 
 @interface ProfileSigninConfirmationViewController (TestingAPI)
 
 @property(readonly, nonatomic) ui::ProfileSigninConfirmationDelegate* delegate;
 @property(readonly, nonatomic) NSButton* createProfileButton;
 @property(readonly, nonatomic) NSTextView* explanationField;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_VIEW_CONTROLLER_