Remove UTF string conversion functions from the global namespace.

chrome/renderer/safe_browsing/phishing_term_feature_extractor_unittest.cc

 // Copyright (c) 2012 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 "chrome/renderer/safe_browsing/phishing_term_feature_extractor.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 170 matching lines @@
 
   // Test with empty page text.
   page_text = base::string16();
   expected_features.Clear();
   features.Clear();
   ASSERT_TRUE(ExtractFeatures(&page_text, &features));
   ExpectFeatureMapsAreEqual(features, expected_features);
 
   // Chinese translation of the phrase "hello goodbye". This tests that
   // we can correctly separate terms in languages that don't use spaces.
-  page_text = UTF8ToUTF16("\xe4\xbd\xa0\xe5\xa5\xbd\xe5\x86\x8d\xe8\xa7\x81");
+  page_text =
+      base::UTF8ToUTF16("\xe4\xbd\xa0\xe5\xa5\xbd\xe5\x86\x8d\xe8\xa7\x81");
   expected_features.Clear();
   expected_features.AddBooleanFeature(
       features::kPageTerm + std::string("\xe4\xbd\xa0\xe5\xa5\xbd"));
   expected_features.AddBooleanFeature(
       features::kPageTerm + std::string("\xe5\x86\x8d\xe8\xa7\x81"));
 
   features.Clear();
   ASSERT_TRUE(ExtractFeatures(&page_text, &features));
   ExpectFeatureMapsAreEqual(features, expected_features);
 }
@@ skipping 107 matching lines @@
   // Now extract normally and make sure nothing breaks.
   EXPECT_TRUE(ExtractFeatures(page_text.get(), &features));
 
   FeatureMap expected_features;
   expected_features.AddBooleanFeature(features::kPageTerm +
                                       std::string("multi word test"));
   ExpectFeatureMapsAreEqual(features, expected_features);
 }
 
 }  // namespace safe_browsing