Merge V8 5.2.361.47  DO NOT MERGE

https://chromium.googlesource.com/v8/v8/+/5.2.361.47

FPIIM-449

Change-Id: Ibec421b85a9b88cb3a432ada642e469fe7e78346
(cherry picked from commit bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8)
diff --git a/src/js/harmony-string-padding.js b/src/js/harmony-string-padding.js
index a6c6c47..dc59823 100644
--- a/src/js/harmony-string-padding.js
+++ b/src/js/harmony-string-padding.js
@@ -30,7 +30,8 @@
   } else {
     fillString = TO_STRING(fillString);
     if (fillString === "") {
-      fillString = " ";
+      // If filler is the empty String, return S.
+      return "";
     }
   }