mojo: Improve crash stack.

mojo/runner/desktop/main_helper.cc

 // Copyright 2015 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 "mojo/runner/desktop/main_helper.h"
 
-
 #include "base/at_exit.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
-#include "base/debug/stack_trace.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/process/launch.h"
 #include "base/stl_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
 #include "mojo/runner/desktop/launcher_process.h"
 #include "mojo/runner/host/child_process.h"
 #include "mojo/runner/host/switches.h"
 #include "mojo/runner/init.h"
@@ skipping 12 matching lines @@
                const base::Closure& callback) {
   base::CommandLine::Init(argc, argv);
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   base::AtExitManager at_exit;
   InitializeLogging();
   WaitForDebuggerIfNecessary();
 
 #if !defined(OFFICIAL_BUILD)
-  base::debug::EnableInProcessStackDumping();

[sadrul, 2015/12/03 18:15:51]

Remove this caused no backtrace when mus crashes. That's a regression :( Can
this remain in place?

 #if defined(OS_WIN)
   base::RouteStdioToConsole(false);
 #endif
 #endif
 
   if (command_line.HasSwitch(switches::kChildProcess))
     return ChildProcessMain();
 
   return LauncherProcessMain(mojo_url, callback);
 }
 
 }  // namespace runner
 }  // namespace mojo