Add and use a base::i18n::StringWithDirection for carrying titles.

base/i18n/rtl.h

Index: base/i18n/rtl.h
diff --git a/base/i18n/rtl.h b/base/i18n/rtl.h
index a75ed4f967bcd20bd42048994bf5114d51825917..bca4d3bad4c625bf352b8c244410ac73ac71ca22 100644
--- a/base/i18n/rtl.h
+++ b/base/i18n/rtl.h
@@ -31,6 +31,19 @@ enum TextDirection {
   LEFT_TO_RIGHT,
 };
 
+// A string along with the text direction it should be displayed in.
+// Conceptually this is a struct; we just use 'class' to make it easier for
+// others to forward-declare us with 'class StringWithDirection'.
+class StringWithDirection {

[darin (slow to review), 2011/04/21 02:56:00]

String16WithDirection maybe?  see NullableString16 and StringPiece

+public:
+  StringWithDirection() : direction(UNKNOWN_DIRECTION) { }
+  StringWithDirection(const string16& str, TextDirection dir)
+      : string(str), direction(dir) { }
+
+  string16 string;

[darin (slow to review), 2011/04/21 02:56:00]

do you need to mutate these later?  how about just providing const accessors
like NullableString16 to enforce RAII?

+  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.