Change NavigationEntry's title fields to carry the text direction.

base/i18n/rtl.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 BASE_I18N_RTL_H_
 #define BASE_I18N_RTL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 25 matching lines @@
 // others to forward-declare us with 'class String16WithDirection'.
 class String16WithDirection {
  public:
   String16WithDirection() : direction_(UNKNOWN_DIRECTION) { }
   String16WithDirection(const string16& str, TextDirection dir)
       : string_(str), direction_(dir) { }
 
   const string16& string() const { return string_; }
   TextDirection direction() const { return direction_; }
 
+  bool is_empty() const { return string_.empty(); }
+  bool operator==(const String16WithDirection& other) const {
+    return string_ == other.string_ && direction_ == other.direction_;
+  }
+
  private:
   string16 string_;
   TextDirection direction_;
 };
 
 // Get the locale that the currently running process has been configured to use.
 // The return value is of the form language[-country] (e.g., en-US) where the
 // language is the 2 or 3 letter code from ISO-639.
 std::string GetConfiguredLocale();
 
@@ skipping 101 matching lines @@
 // return the text itself. Explicit bidi control characters display and have
 // semantic effect. They can be deleted so they might not always appear in a
 // pair.
 const string16 StripWrappingBidiControlCharacters(const string16& text)
     WARN_UNUSED_RESULT;
 
 }  // namespace i18n
 }  // namespace base
 
 #endif  // BASE_I18N_RTL_H_