am 83fd6375: am 31631861: Merge "Add guards to prevent typedefs when C++11 is available."

* commit '83fd6375f6d9016afe9bb03453d39b8c41cda548':
  Add guards to prevent typedefs when C++11 is available.
diff --git a/include/utils/Unicode.h b/include/utils/Unicode.h
index c8c87c3..5b98de2 100644
--- a/include/utils/Unicode.h
+++ b/include/utils/Unicode.h
@@ -22,8 +22,11 @@
 
 extern "C" {
 
+// Definitions exist in C++11
+#if defined __cplusplus && __cplusplus < 201103L
 typedef uint32_t char32_t;
 typedef uint16_t char16_t;
+#endif
 
 // Standard string functions on char16_t strings.
 int strcmp16(const char16_t *, const char16_t *);