[Autofill] Enable Autofill for dynamically created forms.

components/autofill/core/common/form_data.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_COMMON_FORM_DATA_H_
 #define COMPONENTS_AUTOFILL_CORE_COMMON_FORM_DATA_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
 #include "components/autofill/core/common/form_field_data.h"
 #include "url/gurl.h"
 
 namespace autofill {
 
 // Holds information about a form to be filled and/or submitted.
 struct FormData {
   FormData();
   FormData(const FormData& data);
   ~FormData();
 
   // Used in testing.
   bool operator==(const FormData& form) const;
   bool operator!=(const FormData& form) const;
 
+  // Allow FormData to be a key in STL containers.
+  bool operator<(const FormData& form) const;
+
   // The name of the form.
   base::string16 name;
   // GET or POST.
   base::string16 method;
   // The URL (minus query parameters) containing the form.
   GURL origin;
   // The action target of the form.
   GURL action;
   // true if this form was submitted by a user gesture and not javascript.
   bool user_submitted;
   // A vector of all the input fields in the form.
   std::vector<FormFieldData> fields;
 };
 
 // For testing.
 std::ostream& operator<<(std::ostream& os, const FormData& form);
 
 // Serialize FormData. Used by the PasswordManager to persist FormData
 // pertaining to password forms. Serialized data is appended to |pickle|
 void SerializeFormData(const FormData& form_data, Pickle* pickle);
 // Deserialize FormData. This assumes that |iter| is currently pointing to
 // the part of a pickle created by SerializeFormData. Returns true on success.
 bool DeserializeFormData(PickleIterator* iter, FormData* form_data);
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_COMMON_FORM_DATA_H_