Add utf_string_conversions to base namespace.

chrome/browser/bookmarks/bookmark_model_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/browser/bookmarks/bookmark_model.h"
 
 #include <set>
 #include <string>
 
 #include "base/base_paths.h"
@@ skipping 273 matching lines @@
   ASSERT_EQ(BookmarkNode::URL, new_node->type());
   ASSERT_TRUE(new_node == model_.GetMostRecentlyAddedNodeForURL(url));
 
   EXPECT_TRUE(new_node->id() != root->id() &&
               new_node->id() != model_.other_node()->id() &&
               new_node->id() != model_.mobile_node()->id());
 }
 
 TEST_F(BookmarkModelTest, AddURLWithUnicodeTitle) {
   const BookmarkNode* root = model_.bookmark_bar_node();
-  const string16 title(WideToUTF16(
+  const string16 title(base::WideToUTF16(
       L"\u767e\u5ea6\u4e00\u4e0b\uff0c\u4f60\u5c31\u77e5\u9053"));
   const GURL url("https://www.baidu.com/");
 
   const BookmarkNode* new_node = model_.AddURL(root, 0, title, url);
   AssertObserverCount(1, 0, 0, 0, 0);
   observer_details_.ExpectEquals(root, NULL, 0, -1);
 
   ASSERT_EQ(1, root->child_count());
   ASSERT_EQ(title, new_node->GetTitle());
   ASSERT_TRUE(url == new_node->url());
@@ skipping 745 matching lines @@
 
   EXPECT_TRUE(node.DeleteMetaInfo("key1"));
   EXPECT_TRUE(node.DeleteMetaInfo("key2"));
   EXPECT_FALSE(node.DeleteMetaInfo("key3"));
   EXPECT_FALSE(node.GetMetaInfo("key1", &out_value));
   EXPECT_FALSE(node.GetMetaInfo("key2", &out_value));
   EXPECT_TRUE(node.meta_info_str().empty());
 }
 
 }  // namespace