Update from https://crrev.com/304121

base/message_loop/message_loop.cc

 // Copyright 2013 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 "base/message_loop/message_loop.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 88 matching lines @@
 }
 
 #if defined(OS_IOS)
 typedef MessagePumpIOSForIO MessagePumpForIO;
 #elif defined(OS_NACL_SFI)
 typedef MessagePumpDefault MessagePumpForIO;
 #elif defined(OS_POSIX)
 typedef MessagePumpLibevent MessagePumpForIO;
 #endif
 
+#if !defined(OS_NACL_SFI)
 MessagePumpForIO* ToPumpIO(MessagePump* pump) {
   return static_cast<MessagePumpForIO*>(pump);
 }
+#endif  // !defined(OS_NACL_SFI)
 
 }  // namespace
 
 //------------------------------------------------------------------------------
 
 MessageLoop::TaskObserver::TaskObserver() {
 }
 
 MessageLoop::TaskObserver::~TaskObserver() {
 }
@@ skipping 588 matching lines @@
       persistent,
       mode,
       controller,
       delegate);
 }
 #endif
 
 #endif  // !defined(OS_NACL_SFI)
 
 }  // namespace base