Fix behavior of HTMLInputElement.maxLength/minLength getter

components/autofill/core/browser/autofill_field.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/autofill_field.h"
 
 #include <stdint.h>
 
 #include "base/command_line.h"
 #include "base/i18n/string_search.h"
@@ skipping 578 matching lines @@
   }
 
   // If no max length was specified, return the complete number.
   if (field_data.max_length == 0)
     return number;
 
   // If |number| exceeds the maximum size of the field, cut the first part to
   // provide a valid number for the field. For example, the number 15142365264
   // with a field with a max length of 10 would return 5142365264, thus removing
   // the country code and remaining valid.
-  if (number.length() > field_data.max_length) {
+  if (static_cast<int>(number.length()) > field_data.max_length && field_data.max_length > -1) {
     return number.substr(number.length() - field_data.max_length,
                          field_data.max_length);
   }
 
   return number;
 }
 
 // static
 bool AutofillField::FindValueInSelectControl(const FormFieldData& field,
                                              const base::string16& value,
@@ skipping 14 matching lines @@
     if (compare.StringsEqual(value_stripped, option_contents)) {
       if (index)
         *index = i;
       return true;
     }
   }
   return false;
 }
 
 }  // namespace autofill