Revert of Move prefix_set and parts of s_b_util into a new component safe_browsing_db.

components/safe_browsing_db/safe_browsing_db_util_unittest.cc

Index: components/safe_browsing_db/safe_browsing_db_util_unittest.cc
diff --git a/components/safe_browsing_db/safe_browsing_db_util_unittest.cc b/components/safe_browsing_db/safe_browsing_db_util_unittest.cc
deleted file mode 100644
index 9af7d58cff9bb1fa0772c65180c57405ea02a79e..0000000000000000000000000000000000000000
--- a/components/safe_browsing_db/safe_browsing_db_util_unittest.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) 2015 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 <algorithm>
-
-#include "components/safe_browsing_db/safe_browsing_db_util.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-TEST(SafeBrowsingDbUtilTest, FullHashOperators) {
-  const SBFullHash kHash1 = SBFullHashForString("one");
-  const SBFullHash kHash2 = SBFullHashForString("two");
-
-  EXPECT_TRUE(SBFullHashEqual(kHash1, kHash1));
-  EXPECT_TRUE(SBFullHashEqual(kHash2, kHash2));
-  EXPECT_FALSE(SBFullHashEqual(kHash1, kHash2));
-  EXPECT_FALSE(SBFullHashEqual(kHash2, kHash1));
-
-  EXPECT_FALSE(SBFullHashLess(kHash1, kHash2));
-  EXPECT_TRUE(SBFullHashLess(kHash2, kHash1));
-
-  EXPECT_FALSE(SBFullHashLess(kHash1, kHash1));
-  EXPECT_FALSE(SBFullHashLess(kHash2, kHash2));
-}
-
-}  // namespace