Fix NaCl build.

src/base/platform/semaphore.cc

 // Copyright 2013 the V8 project 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 "src/base/platform/semaphore.h"
 
 #if V8_OS_MACOSX
 #include <mach/mach_init.h>
 #include <mach/task.h>
 #endif
@@ skipping 96 matching lines @@
 
 
 bool Semaphore::WaitFor(const TimeDelta& rel_time) {
 #if V8_OS_NACL
   // PNaCL doesn't support sem_timedwait, do ugly busy waiting.
   ElapsedTimer timer;
   timer.Start();
   do {
     int result = sem_trywait(&native_handle_);
     if (result == 0) return true;
-    DCHECK(errno == EAGAIN || error == EINTR);
+    DCHECK(errno == EAGAIN || errno == EINTR);
   } while (!timer.HasExpired(rel_time));
   return false;
 #else
   // Compute the time for end of timeout.
   const Time time = Time::NowFromSystemTime() + rel_time;
   const struct timespec ts = time.ToTimespec();
 
   // Wait for semaphore signalled or timeout.
   while (true) {
     int result = sem_timedwait(&native_handle_, &ts);
@@ skipping 67 matching lines @@
       }
       DCHECK(result == WAIT_OBJECT_0);
       return true;
     }
   }
 }
 
 #endif  // V8_OS_MACOSX
 
 } }  // namespace v8::base