Remove UTF string conversion functions from the global namespace.

components/autofill/core/browser/form_field_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 "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_field.h"
 #include "components/autofill/core/browser/form_field.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 99 matching lines @@
   EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head_tail"),
               FormField::MATCH_LABEL));
 
   // Word boundaries.
   field.label = ASCIIToUTF16("contains word:");
   EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("\\bword\\b"),
                                FormField::MATCH_LABEL));
   EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("\\bcon\\b"),
                                 FormField::MATCH_LABEL));
   // Make sure the circumflex in 'crepe' is not treated as a word boundary.
-  field.label = UTF8ToUTF16("cr" "\xC3\xAA" "pe");
+  field.label = base::UTF8ToUTF16("cr" "\xC3\xAA" "pe");
   EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("\\bcr\\b"),
                                 FormField::MATCH_LABEL));
 }
 
 // Test that we ignore checkable elements.
 TEST(FormFieldTest, ParseFormFields) {
   ScopedVector<AutofillField> fields;
   FormFieldData field_data;
   field_data.form_control_type = "text";
 
@@ skipping 14 matching lines @@
   // Checkable element shouldn't interfere with inference of Address line2.
   EXPECT_EQ(2U, field_type_map.size());
 
   EXPECT_EQ(ADDRESS_HOME_LINE1,
             field_type_map.find(ASCIIToUTF16("Address line1"))->second);
   EXPECT_EQ(ADDRESS_HOME_LINE2,
             field_type_map.find(ASCIIToUTF16("Address line2"))->second);
 }
 
 }  // namespace autofill