iwyu: Cleanup in the following files:

chrome/browser/autofill/credit_card_field_unittest.cc

 // Copyright (c) 2011 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 "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/autofill/autofill_field.h"
 #include "chrome/browser/autofill/credit_card_field.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/glue/form_field.h"
 
 namespace {
 
 class CreditCardFieldTest : public testing::Test {
  public:
   CreditCardFieldTest() {}
 
@@ skipping 382 matching lines @@
       field_type_map_.find(ASCIIToUTF16("month")) != field_type_map_.end());
   EXPECT_EQ(CREDIT_CARD_EXP_MONTH, field_type_map_[ASCIIToUTF16("month")]);
   ASSERT_TRUE(
       field_type_map_.find(ASCIIToUTF16("year")) != field_type_map_.end());
   EXPECT_EQ(CREDIT_CARD_EXP_4_DIGIT_YEAR,
       field_type_map_[ASCIIToUTF16("year")]);
 }
 
 }  // namespace