Update some uses of char16 to use the base:: namespace.

remoting/host/win/security_descriptor.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/win/security_descriptor.h"
 
 #include <sddl.h>
 
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 10 matching lines @@
 
   ScopedSd sd(length);
   memcpy(sd.get(), raw_sd, length);
 
   LocalFree(raw_sd);
   return sd.Pass();
 }
 
 // Converts a SID into a text string.
 std::string ConvertSidToString(SID* sid) {
-  char16* c_sid_string = NULL;
+  base::char16* c_sid_string = NULL;
   if (!ConvertSidToStringSid(sid, &c_sid_string))
     return std::string();
 
   base::string16 sid_string(c_sid_string);
   LocalFree(c_sid_string);
   return UTF16ToUTF8(sid_string);
 }
 
 // Returns the logon SID of a token. Returns NULL if the token does not specify
 // a logon SID or in case of an error.
@@ skipping 74 matching lines @@
 
   absolute_sd->Swap(local_absolute_sd);
   dacl->Swap(local_dacl);
   group->Swap(local_group);
   owner->Swap(local_owner);
   sacl->Swap(local_sacl);
   return true;
 }
 
 }  // namespace remoting