Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/bookmarks/bookmark_ui_utils_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/ui/bookmarks/bookmark_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/test/base/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 
+using base::ASCIIToUTF16;
+
 namespace {
 
 TEST(BookmarkUIUtilsTest, HasBookmarkURLs) {
   BookmarkModel model(NULL);
 
   std::vector<const BookmarkNode*> nodes;
 
   // This tests that |nodes| contains an URL.
   const BookmarkNode* page1 = model.AddURL(model.bookmark_bar_node(), 0,
                                            ASCIIToUTF16("Google"),
@@ skipping 80 matching lines @@
   const BookmarkNode* subfolder1 = model.AddFolder(folder1, 0,
                                                    ASCIIToUTF16("Subfolder1"));
 
   // Now add the URL to that |subfolder1|.
   model.AddURL(subfolder1, 0, ASCIIToUTF16("BAR"), GURL("http://bar-foo.com"));
   EXPECT_FALSE(chrome::HasBookmarkURLsAllowedInIncognitoMode(nodes, &profile));
 }
 
 }  // namespace
 #endif