Remove UTF string conversion functions from the global namespace.

ui/views/corewm/tooltip_aura_unittest.cc

 // Copyright 2013 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 "ui/views/corewm/tooltip_aura.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/font_list.h"
 #include "ui/gfx/text_elider.h"
 #include "ui/gfx/text_utils.h"
 #include "ui/views/test/views_test_base.h"
 
 using base::ASCIIToUTF16;
+using base::UTF8ToUTF16;
 
 namespace views {
 namespace corewm {
 
 typedef ViewsTestBase TooltipAuraTest;
 
 TEST_F(TooltipAuraTest, TrimTooltipToFitTests) {
   const gfx::FontList font_list;
   const int max_width = 4000;
   base::string16 tooltip;
@@ skipping 97 matching lines @@
   TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
                                 &line_count);
   EXPECT_EQ(gfx::GetStringWidth(ASCIIToUTF16("Small  Tool  t\tip"), font_list),
             width);
   EXPECT_EQ(1, line_count);
   EXPECT_EQ(ASCIIToUTF16("Small  Tool  t\tip"), tooltip);
 }
 
 }  // namespace corewm
 }  // namespace views