Replace RE2 import with a dependency

third_party/re2/util/test.h

-// Copyright 2009 The RE2 Authors.  All Rights Reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#ifndef RE2_UTIL_TEST_H__
-#define RE2_UTIL_TEST_H__
-
-#include "util/util.h"
-#include "util/flags.h"
-
-#define TEST(x, y) \
-        void x##y(void); \
-        TestRegisterer r##x##y(x##y, # x "." # y); \
-        void x##y(void)
-
-void RegisterTest(void (*)(void), const char*);
-
-class TestRegisterer {
- public:
-  TestRegisterer(void (*fn)(void), const char *s) {
-    RegisterTest(fn, s);
-  }
-};
-
-// TODO(rsc): Do a better job.
-#define EXPECT_EQ CHECK_EQ
-#define EXPECT_TRUE CHECK
-#define EXPECT_LT CHECK_LT
-#define EXPECT_GT CHECK_GT
-#define EXPECT_LE CHECK_LE
-#define EXPECT_GE CHECK_GE
-#define EXPECT_FALSE(x) CHECK(!(x))
-
-namespace testing {
-class MallocCounter {
- public:
-  MallocCounter(int x) {}
-  static const int THIS_THREAD_ONLY = 0;
-  long long HeapGrowth() { return 0; }
-  long long PeakHeapGrowth() { return 0; }
-  void Reset() {}
-};
-}  // namespace testing
-
-#endif  // RE2_UTIL_TEST_H__