Update some uses of char16 to use the base:: namespace.

ui/gfx/text_utils_unittest.cc

 // Copyright (c) 2011 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/gfx/text_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gfx {
 namespace {
 
-const char16 kAcceleratorChar = '&';
+const base::char16 kAcceleratorChar = '&';
 
 TEST(TextUtilsTest, RemoveAcceleratorChar) {
   struct TestData {
     const char* input;
     int accelerated_char_pos;
     int accelerated_char_span;
     const char* output;
   } cases[] = {
     { "", -1, 0, "" },
     { "&", -1, 0, "" },
@@ skipping 29 matching lines @@
                                                   &accelerated_char_pos,
                                                   &accelerated_char_span);
     EXPECT_EQ(result, UTF8ToUTF16(cases[i].output));
     EXPECT_EQ(accelerated_char_pos, cases[i].accelerated_char_pos);
     EXPECT_EQ(accelerated_char_span, cases[i].accelerated_char_span);
   }
 }
 
 }  // namespace
 }  // namespace gfx