Show the callstack that a nontransferable message pipe was first used if it's erroneously sent later

mojo/runner/desktop/launcher_process.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 <stdio.h>
 #include <string.h>
 
 #include <algorithm>
 #include <iostream>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/debug/stack_trace.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
 #include "mojo/runner/context.h"
 #include "mojo/runner/switches.h"
 #include "mojo/shell/switches.h"
 
 namespace mojo {
 namespace runner {
 
 int LauncherProcessMain(const GURL& mojo_url, const base::Closure& callback) {
+#if !defined(OFFICIAL_BUILD)
+  base::debug::EnableInProcessStackDumping();
+#endif
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (!command_line->HasSwitch(switches::kMojoSingleProcess) &&
       !command_line->HasSwitch("gtest_list_tests"))
     command_line->AppendSwitch(switches::kEnableMultiprocess);
   command_line->AppendSwitch("use-new-edk");
   // http://crbug.com/546644
   command_line->AppendSwitch(switches::kMojoNoSandbox);
 
   base::PlatformThread::SetName("mojo_runner");
 
@@ skipping 22 matching lines @@
 
     // Must be called before |message_loop| is destroyed.
     shell_context.Shutdown();
   }
 
   return 0;
 }
 
 }  // namespace runner
 }  // namespace mojo