autofill: switch autofill_regexes to RE2 library

components/autofill/core/common/autofill_regexes_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/autofill_regexes.h"
 
-#include "base/strings/string16.h"
-#include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_regex_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using base::ASCIIToUTF16;
-
 namespace autofill {
 
 TEST(AutofillRegexesTest, AutofillRegexes) {

[tfarina, 2015/11/18 18:03:10]

Are these test cases enough Ilya? I'm not sure about what to test here, please,
advice!

   struct TestCase {
     const char* const input;
     const char* const pattern;
   };
 
   const TestCase kPositiveCases[] = {
     // Empty pattern
     {"", ""},
     {"Look, ma' -- a non-empty string!", ""},
     // Substring
     {"string", "tri"},
     // Substring at beginning
     {"string", "str"},
     {"string", "^str"},
     // Substring at end
     {"string", "ring"},
     {"string", "ring$"},
     // Case-insensitive
     {"StRiNg", "string"},
   };
   for (size_t i = 0; i < arraysize(kPositiveCases); ++i) {
     const TestCase& test_case = kPositiveCases[i];
     SCOPED_TRACE(test_case.input);
     SCOPED_TRACE(test_case.pattern);
-    EXPECT_TRUE(MatchesPattern(ASCIIToUTF16(test_case.input),
-                               ASCIIToUTF16(test_case.pattern)));
+    EXPECT_TRUE(MatchesPattern(test_case.input, test_case.pattern));
   }
 
   const TestCase kNegativeCases[] = {
     // Empty string
     {"", "Look, ma' -- a non-empty pattern!"},
     // Substring
     {"string", "trn"},
     // Substring at beginning
     {"string", " str"},
     {"string", "^tri"},
     // Substring at end
     {"string", "ring "},
     {"string", "rin$"},
   };
   for (size_t i = 0; i < arraysize(kNegativeCases); ++i) {
     const TestCase& test_case = kNegativeCases[i];
     SCOPED_TRACE(test_case.input);
     SCOPED_TRACE(test_case.pattern);
-    EXPECT_FALSE(MatchesPattern(ASCIIToUTF16(test_case.input),
-                                ASCIIToUTF16(test_case.pattern)));
+    EXPECT_FALSE(MatchesPattern(test_case.input, test_case.pattern));
   }
 }
 
 }  // namespace autofill