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

chrome/browser/ui/bookmarks/recently_used_folders_combo_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/ui/bookmarks/recently_used_folders_combo_model.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
@@ skipping 66 matching lines @@
   message_loop_.RunUntilIdle();
 }
 
 BookmarkModel* RecentlyUsedFoldersComboModelTest::GetModel() {
   return BookmarkModelFactory::GetForProfile(profile_.get());
 }
 
 // Verifies there are no duplicate nodes in the model.
 TEST_F(RecentlyUsedFoldersComboModelTest, NoDups) {
   const BookmarkNode* new_node = GetModel()->AddURL(
-      GetModel()->bookmark_bar_node(), 0, ASCIIToUTF16("a"),
+      GetModel()->bookmark_bar_node(), 0, base::ASCIIToUTF16("a"),
       GURL("http://a"));
   RecentlyUsedFoldersComboModel model(GetModel(), new_node);
   std::set<base::string16> items;
   for (int i = 0; i < model.GetItemCount(); ++i) {
     if (!model.IsItemSeparatorAt(i))
       EXPECT_EQ(0u, items.count(model.GetItemAt(i)));
   }
 }
 
 // Verifies that observers are notified on changes.
 TEST_F(RecentlyUsedFoldersComboModelTest, NotifyObserver) {
   const BookmarkNode* folder = GetModel()->AddFolder(
-      GetModel()->bookmark_bar_node(), 0, ASCIIToUTF16("a"));
+      GetModel()->bookmark_bar_node(), 0, base::ASCIIToUTF16("a"));
   const BookmarkNode* sub_folder = GetModel()->AddFolder(
-      folder, 0, ASCIIToUTF16("b"));
+      folder, 0, base::ASCIIToUTF16("b"));
   const BookmarkNode* new_node = GetModel()->AddURL(
-      sub_folder, 0, ASCIIToUTF16("a"), GURL("http://a"));
+      sub_folder, 0, base::ASCIIToUTF16("a"), GURL("http://a"));
   RecentlyUsedFoldersComboModel model(GetModel(), new_node);
   TestComboboxModelObserver observer;
   model.AddObserver(&observer);
 
   const int initial_count = model.GetItemCount();
   // Remove a folder, it should remove an item from the model too.
   GetModel()->Remove(folder, folder->GetIndexOf(sub_folder));
   EXPECT_TRUE(observer.GetAndClearChanged());
   const int updated_count = model.GetItemCount();
   EXPECT_LT(updated_count, initial_count);
 
   // Remove all, which should remove a folder too.
   GetModel()->RemoveAll();
   EXPECT_TRUE(observer.GetAndClearChanged());
   EXPECT_LT(model.GetItemCount(), updated_count);
 
   model.RemoveObserver(&observer);
 }