Replace string16 with base::string16.

chrome/browser/browsing_data/browsing_data_indexed_db_helper_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 "testing/gtest/include/gtest/gtest.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/browsing_data_indexed_db_helper.h"
 #include "chrome/test/base/testing_profile.h"
 
 namespace {
 
 typedef testing::Test CannedBrowsingDataIndexedDBHelperTest;
 
 TEST_F(CannedBrowsingDataIndexedDBHelperTest, Empty) {
   const GURL origin("http://host1:1/");
-  const string16 description(ASCIIToUTF16("description"));
+  const base::string16 description(ASCIIToUTF16("description"));
 
   scoped_refptr<CannedBrowsingDataIndexedDBHelper> helper(
       new CannedBrowsingDataIndexedDBHelper());
 
   ASSERT_TRUE(helper->empty());
   helper->AddIndexedDB(origin, description);
   ASSERT_FALSE(helper->empty());
   helper->Reset();
   ASSERT_TRUE(helper->empty());
 }
 
 TEST_F(CannedBrowsingDataIndexedDBHelperTest, IgnoreExtensionsAndDevTools) {
   const GURL origin1("chrome-extension://abcdefghijklmnopqrstuvwxyz/");
   const GURL origin2("chrome-devtools://abcdefghijklmnopqrstuvwxyz/");
-  const string16 description(ASCIIToUTF16("description"));
+  const base::string16 description(ASCIIToUTF16("description"));
 
   scoped_refptr<CannedBrowsingDataIndexedDBHelper> helper(
       new CannedBrowsingDataIndexedDBHelper());
 
   ASSERT_TRUE(helper->empty());
   helper->AddIndexedDB(origin1, description);
   ASSERT_TRUE(helper->empty());
   helper->AddIndexedDB(origin2, description);
   ASSERT_TRUE(helper->empty());
 }
 
 } // namespace