Add unistd.h include in a file using geteuid().

ipc/ipc_sync_channel_unittest.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 "ipc/ipc_sync_channel.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 1499 matching lines @@
     events_[1]->Wait();
     DCHECK(received_msg_ == false);
 
     Message* message = new SyncChannelTestMsg_NoArgs;
     message->set_unblock(true);
     Send(message);
     received_noarg_reply_ = true;
     PossiblyDone();
   }
 
-  base::Thread* ListenerThread() { return Worker::ListenerThread(); }
  private:
   virtual bool OnMessageReceived(const Message& message) OVERRIDE {
     IPC_BEGIN_MESSAGE_MAP(RestrictedDispatchDeadlockClient1, message)
      IPC_MESSAGE_HANDLER(SyncChannelTestMsg_NoArgs, OnNoArgs)
     IPC_END_MESSAGE_MAP()
     return true;
   }
 
   void OnNoArgs() {
     received_msg_ = true;
@@ skipping 364 matching lines @@
 }
 
 // Windows needs to send an out-of-band secret to verify the client end of the
 // channel. Test that we still connect correctly in that case.
 TEST_F(IPCSyncChannelTest, Verified) {
   Verified();
 }
 
 }  // namespace
 }  // namespace IPC