IPC: Fix attachment brokering race condition.

ipc/ipc_channel_win.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_channel_win.h"
 
 #include <windows.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 374 matching lines @@
     pipe_.Close();
     return false;
   }
 
   OutputElement* element = new OutputElement(m.release());
   output_queue_.push(element);
   return true;
 }
 
 bool ChannelWin::Connect() {
+  WillConnect();
+
   DLOG_IF(WARNING, thread_check_.get()) << "Connect called more than once";
 
   if (!thread_check_.get())
     thread_check_.reset(new base::ThreadChecker());
 
   if (!pipe_.IsValid())
     return false;
 
   base::MessageLoopForIO::current()->RegisterIOHandler(pipe_.Get(), this);
 
@@ skipping 199 matching lines @@
   int secret;
   do {  // Guarantee we get a non-zero value.
     secret = base::RandInt(0, std::numeric_limits<int>::max());
   } while (secret == 0);
 
   id.append(GenerateUniqueRandomChannelID());
   return id.append(base::StringPrintf("\\%d", secret));
 }
 
 }  // namespace IPC