Sync: Do not generate non-UTF8 names for delete directives.

base/rand_util.h

Index: base/rand_util.h
===================================================================
--- base/rand_util.h	(revision 268622)
+++ base/rand_util.h	(working copy)
@@ -39,10 +39,11 @@
 // See crypto/ for cryptographically secure random number generation APIs.
 BASE_EXPORT void RandBytes(void* output, size_t output_length);
 
-// Fills a string of length |length| with with random data and returns it.
+// Fills a string of length |length| with random data and returns it.
 // |length| should be nonzero.
 //
 // Note that this is a variation of |RandBytes| with a different return type.
+// The returned string is likely not ASCII/UTF-8. Use with care.
 //
 // WARNING:
 // Do not use for security-sensitive purposes.