ui/gfx: Use base::string16 now that string16 was moved into 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 {
@@ skipping 30 matching lines @@
     { "Test\xF0\x9D\x92\x9C&ing", 6, 1, "Test\xF0\x9D\x92\x9Cing" },
     { "Test&\xF0\x9D\x92\x9C&ing", 6, 1, "Test\xF0\x9D\x92\x9Cing" },
     { "Test&\xF0\x9D\x92\x9C&&ing", 4, 2, "Test\xF0\x9D\x92\x9C&ing" },
     { "Test&\xF0\x9D\x92\x9C&\xF0\x9D\x92\x9Cing", 6, 2,
       "Test\xF0\x9D\x92\x9C\xF0\x9D\x92\x9Cing" },
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
     int accelerated_char_pos;
     int accelerated_char_span;
-    string16 result = RemoveAcceleratorChar(UTF8ToUTF16(cases[i].input),
-                                            kAcceleratorChar,
-                                            &accelerated_char_pos,
-                                            &accelerated_char_span);
+    base::string16 result = RemoveAcceleratorChar(UTF8ToUTF16(cases[i].input),
+                                                  kAcceleratorChar,
+                                                  &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