chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.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_CHROMEOS_LOGIN_ENROLLMENT_ENTERPRISE_ENROLLMENT_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_ENROLLMENT_ENTERPRISE_ENROLLMENT_HELPER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_initializer.h"
 
 class GoogleServiceAuthError;
-class Profile;
 
 namespace policy {
 struct EnrollmentConfig;
 class EnrollmentStatus;
 }
 
 namespace chromeos {
 
 // This class is capable to enroll the device into enterprise domain, using
 // either a profile containing authentication data or OAuth token.
@@ skipping 110 matching lines @@
   // If this is not nullptr, then it will be used to create the enrollment
   // helper. |create_mock_enrollment_helper_| needs to outlive this class.
   static CreateMockEnrollmentHelper create_mock_enrollment_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(EnterpriseEnrollmentHelper);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_ENROLLMENT_ENTERPRISE_ENROLLMENT_HELPER_H_