Autofill: Set requirements for number of recognized fields in an autofillable form

components/autofill/core/browser/email_field.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_EMAIL_FIELD_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_EMAIL_FIELD_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/autofill/core/browser/form_field.h"
 
 namespace autofill {
 
 class EmailField : public FormField {
  public:
   static scoped_ptr<FormField> Parse(AutofillScanner* scanner);
 
  protected:
   // FormField:
   bool ClassifyField(ServerFieldTypeMap* map) const override;
+  size_t FieldCount() const override;
 
  private:
   explicit EmailField(const AutofillField* field);
 
   const AutofillField* field_;
 
   DISALLOW_COPY_AND_ASSIGN(EmailField);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_EMAIL_FIELD_H_