NaCl: Use C++-style comments as per the Chromium style

chrome/app/nacl_fork_delegate_linux.cc

Index: chrome/app/nacl_fork_delegate_linux.cc
diff --git a/chrome/app/nacl_fork_delegate_linux.cc b/chrome/app/nacl_fork_delegate_linux.cc
index 69514bd00b4376715982e25edbbacd7105897d88..3849242871818a99e04b21e25ec5aebab16c6b48 100644
--- a/chrome/app/nacl_fork_delegate_linux.cc
+++ b/chrome/app/nacl_fork_delegate_linux.cc
@@ -29,10 +29,8 @@ NaClForkDelegate::NaClForkDelegate()
       sandboxed_(false),
       fd_(-1) {}
 
-/*
- * Note these need to match up with their counterparts in nacl_helper_linux.c
- * and nacl_helper_bootstrap_linux.c.
- */
+// Note these need to match up with their counterparts in nacl_helper_linux.c
+// and nacl_helper_bootstrap_linux.c.
 const char kNaClHelperReservedAtZero[] =
     "--reserved_at_zero=0xXXXXXXXXXXXXXXXX";
 const char kNaClHelperRDebug[] = "--r_debug=0xXXXXXXXXXXXXXXXX";