Get rid of unnecessary forward declarations in components/autofill/

components/autofill/core/browser/autofill_profile.h

 // Copyright 2013 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 COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 
 #include <stddef.h>
 
 #include <iosfwd>
 #include <list>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "components/autofill/core/browser/address.h"
 #include "components/autofill/core/browser/autofill_data_model.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/contact_info.h"
 #include "components/autofill/core/browser/phone_number.h"
 
 namespace autofill {
 
-struct FormFieldData;
-
 // A collection of FormGroups stored in a profile.  AutofillProfile also
 // implements the FormGroup interface so that owners of this object can request
 // form information from the profile, and the profile will delegate the request
 // to the requested form group type.
 class AutofillProfile : public AutofillDataModel {
  public:
   AutofillProfile(const std::string& guid, const std::string& origin);
 
   // For use in STL containers.
   AutofillProfile();
@@ skipping 170 matching lines @@
   // The BCP 47 language code that can be used to format |address_| for display.
   std::string language_code_;
 };
 
 // So we can compare AutofillProfiles with EXPECT_EQ().
 std::ostream& operator<<(std::ostream& os, const AutofillProfile& profile);
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_