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

chrome/browser/ui/gtk/bookmarks/bookmark_bar_gtk_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/gtk/bookmarks/bookmark_bar_gtk.h"
 
 #include "base/compiler_specific.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
@@ skipping 55 matching lines @@
   bookmark_bar_->Loaded(model_, false);
 
   // There are no bookmarks in the model by default. Expect that the
   // |instructions_label| is shown.
   EXPECT_TRUE(bookmark_bar_->show_instructions_);
 }
 
 TEST_F(BookmarkBarGtkUnittest, HidesHelpMessageWithBookmark) {
   const BookmarkNode* parent = model_->bookmark_bar_node();
   model_->AddURL(parent, parent->child_count(),
-                 ASCIIToUTF16("title"), GURL("http://one.com"));
+                 base::ASCIIToUTF16("title"), GURL("http://one.com"));
 
   bookmark_bar_->Loaded(model_, false);
   EXPECT_FALSE(bookmark_bar_->show_instructions_);
 }
 
 TEST_F(BookmarkBarGtkUnittest, BuildsButtons) {
   const BookmarkNode* parent = model_->bookmark_bar_node();
   model_->AddURL(parent, parent->child_count(),
-                 ASCIIToUTF16("title"), GURL("http://one.com"));
+                 base::ASCIIToUTF16("title"), GURL("http://one.com"));
   model_->AddURL(parent, parent->child_count(),
-                 ASCIIToUTF16("other"), GURL("http://two.com"));
+                 base::ASCIIToUTF16("other"), GURL("http://two.com"));
 
   bookmark_bar_->Loaded(model_, false);
 
   // We should expect two children to the bookmark bar's toolbar.
   GList* children = gtk_container_get_children(
       GTK_CONTAINER(bookmark_bar_->bookmark_toolbar_.get()));
   EXPECT_EQ(2U, g_list_length(children));
   g_list_free(children);
 }