Import Cobalt 21.master.0.267507

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5630
    by devin.cai@mediatek.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5710
    by p.mirgos@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5730
    by lizhi.fan@samsung.com
diff --git a/src/starboard/shared/stub/string_concat_wide.cc b/src/starboard/shared/stub/string_concat_wide.cc
index 35ea63a..0ef185a 100644
--- a/src/starboard/shared/stub/string_concat_wide.cc
+++ b/src/starboard/shared/stub/string_concat_wide.cc
@@ -14,8 +14,8 @@
 
 #include "starboard/common/string.h"
 
-int SbStringConcatWide(wchar_t* /*out_destination*/,
-                       const wchar_t* /*source*/,
-                       int /*destination_size*/) {
+int SbStringConcatWide(wchar_t* out_destination,
+                       const wchar_t* source,
+                       int destination_size) {
   return 0;
 }