Generate passwords only for forms that autofill server marks as account creation forms.

components/autofill/core/browser/form_structure.cc

 // 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.
 
 #include "components/autofill/core/browser/form_structure.h"
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 642 matching lines @@
   }
 
   std::string form_string = scheme + "://" + host + "&" +
                             UTF16ToUTF8(form_name_) +
                             form_signature_field_names_;
 
   return Hash64Bit(form_string);
 }
 
 bool FormStructure::ShouldSkipField(const FormFieldData& field) const {
-  return (field.is_checkable || field.form_control_type == "password");
+  return field.is_checkable;
 }
 
 bool FormStructure::IsAutofillable(bool require_method_post) const {
   if (autofill_count() < kRequiredAutofillFields)
     return false;
 
   return ShouldBeParsed(require_method_post);
 }
 
 void FormStructure::UpdateAutofillCount() {
@@ skipping 527 matching lines @@
        field != fields_.end(); ++field) {
     FieldTypeGroup field_type_group = (*field)->Type().group();
     if (field_type_group == CREDIT_CARD)
       (*field)->set_section((*field)->section() + "-cc");
     else
       (*field)->set_section((*field)->section() + "-default");
   }
 }
 
 }  // namespace autofill