[Password Generation] Use signatures for form matching

components/autofill/core/common/form_field_data_unittest.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/common/form_field_data.h"
 
 #include "base/i18n/rtl.h"
 #include "base/pickle.h"
 #include "base/strings/utf_string_conversions.h"
+#include "components/autofill/core/common/autofill_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace autofill {
 
 namespace {
 
 void FillCommonFields(FormFieldData* data) {
   data->label = base::ASCIIToUTF16("label");
   data->name = base::ASCIIToUTF16("name");
   data->value = base::ASCIIToUTF16("value");
@@ skipping 270 matching lines @@
 
   base::PickleIterator iter(pickle);
   FormFieldData actual;
   EXPECT_FALSE(DeserializeFormFieldData(&iter, &actual));
 
   FormFieldData empty;
   EXPECT_TRUE(actual.SameFieldAs(empty));
 }
 
 }  // namespace autofill