Implement the renderer side of the mojo based local storage implementation.

mojo/common/common_type_converters.h

Index: mojo/common/common_type_converters.h
diff --git a/mojo/common/common_type_converters.h b/mojo/common/common_type_converters.h
index 5f6e3c592099175c77f0819cc06a6816db24f1c7..6dc31f16ad41f28fb1183b259e03e069452aa1da 100644
--- a/mojo/common/common_type_converters.h
+++ b/mojo/common/common_type_converters.h
@@ -36,12 +36,8 @@ struct MOJO_COMMON_EXPORT TypeConverter<base::string16, String> {
   static base::string16 Convert(const String& input);
 };
 
-// TODO(erg): In the very long term, we will want to remove conversion between
-// std::strings and arrays of unsigned bytes. However, there is too much code
-// across chrome which uses std::string as a bag of bytes that we probably
-// don't want to roll this function at each callsite.
 template <>
-struct MOJO_COMMON_EXPORT TypeConverter<std::string, Array<uint8_t> > {
+struct MOJO_COMMON_EXPORT TypeConverter<std::string, Array<uint8_t>> {
   static std::string Convert(const Array<uint8_t>& input);
 };
 
@@ -50,6 +46,16 @@ struct MOJO_COMMON_EXPORT TypeConverter<Array<uint8_t>, std::string> {
   static Array<uint8_t> Convert(const std::string& input);
 };
 
+template <>
+struct MOJO_COMMON_EXPORT TypeConverter<base::string16, Array<uint8_t>> {
+  static base::string16 Convert(const Array<uint8_t>& input);
+};
+
+template <>
+struct MOJO_COMMON_EXPORT TypeConverter<Array<uint8_t>, base::string16> {
+  static Array<uint8_t> Convert(const base::string16& input);
+};
+
 }  // namespace mojo
 
 #endif  // MOJO_COMMON_COMMON_TYPE_CONVERTERS_H_