Use a direct include of strings headers in ui/, part 2.

ui/base/text/bytes_formatting.h

 // 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.
 
 #ifndef UI_BASE_TEXT_BYTES_FORMATTING_H_
 #define UI_BASE_TEXT_BYTES_FORMATTING_H_
 
 #include "base/basictypes.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "ui/base/ui_export.h"
 
 namespace ui {
 
 // Simple API ------------------------------------------------------------------
 
 // Simple call to return a byte quantity as a string in human-readable format.
 // Ex: FormatBytes(512) => "512 B"
 // Ex: FormatBytes(101479) => "99.1 kB"
 UI_EXPORT string16 FormatBytes(int64 bytes);
@@ skipping 27 matching lines @@
                                         bool show_units);
 
 // As above, but with "/s" units for speed values.
 // Ex: FormatSpeed(512, DATA_UNITS_KIBIBYTE, true) => "0.5 kB/s"
 // Ex: FormatSpeed(10*1024, DATA_UNITS_MEBIBYTE, false) => "0.1"
 string16 FormatSpeedWithUnits(int64 bytes, DataUnits units, bool show_units);
 
 }  // namespace ui
 
 #endif  // UI_BASE_TEXT_BYTES_FORMATTING_H_