Revert of Upstream string_util function.

ios/chrome/common/string_util_unittest.mm

-// 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 "ios/chrome/common/string_util.h"
-
-#include "base/mac/scoped_nsobject.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/gtest_mac.h"
-#include "testing/platform_test.h"
-
-namespace {
-
-TEST(StringUtilTest, ParseStringWithLink) {
-  NSArray* const all_test_data = @[
-    @{
-      @"input" : @"Text without link.",
-      @"expected" : @"Text without link.",
-      @"link range" : [NSValue valueWithRange:NSMakeRange(NSNotFound, 0)]
-    },
-    @{
-      @"input" : @"Text with empty link BEGIN_LINK END_LINK.",
-      @"expected" : @"Text with empty link .",
-      @"link range" : [NSValue valueWithRange:NSMakeRange(21, 0)]
-    },
-    @{
-      @"input" : @"Text with BEGIN_LINK and no end link.",
-      @"expected" : @"Text with BEGIN_LINK and no end link.",
-      @"link range" : [NSValue valueWithRange:NSMakeRange(NSNotFound, 0)]
-    },
-    @{
-      @"input" : @"Text with valid BEGIN_LINK link END_LINK and spaces.",
-      @"expected" : @"Text with valid link and spaces.",
-      @"link range" : [NSValue valueWithRange:NSMakeRange(16, 4)]
-    },
-    @{
-      @"input" : @"Text with valid BEGIN_LINKlinkEND_LINK and no spaces.",
-      @"expected" : @"Text with valid link and no spaces.",
-      @"link range" : [NSValue valueWithRange:NSMakeRange(16, 4)]
-    }
-  ];
-  for (NSDictionary* test_data : all_test_data) {
-    NSString* input_text = test_data[@"input"];
-    NSString* expected_text = test_data[@"expected"];
-    NSRange expected_range = [test_data[@"link range"] rangeValue];
-
-    EXPECT_NSEQ(expected_text, ParseStringWithLink(input_text, nullptr));
-
-    // Initialize |range| with some values that are not equal to the expected
-    // ones.
-    NSRange range = NSMakeRange(1000, 2000);
-    EXPECT_NSEQ(expected_text, ParseStringWithLink(input_text, &range));
-    EXPECT_EQ(expected_range.location, range.location);
-    EXPECT_EQ(expected_range.length, range.length);
-  }
-}
-
-}  // namespace