Simplify It2Me host shutdown

remoting/host/it2me/it2me_native_messaging_host_main.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 "remoting/host/it2me/it2me_native_messaging_host_main.h"
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "net/socket/ssl_server_socket.h"
 #include "remoting/base/breakpad.h"
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/host_exit_codes.h"
 #include "remoting/host/it2me/it2me_native_messaging_host.h"
 #include "remoting/host/logging.h"
 #include "remoting/host/native_messaging/native_messaging_pipe.h"
 #include "remoting/host/native_messaging/pipe_messaging_channel.h"
 #include "remoting/host/resources.h"
 #include "remoting/host/usage_stats_consent.h"
 
 #if defined(OS_LINUX)
 #include <gtk/gtk.h>
 #include <X11/Xlib.h>
+
+#include "base/linux_util.h"
 #endif  // defined(OS_LINUX)
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif  // defined(OS_MACOSX)
 
 #if defined(OS_WIN)
 #include <commctrl.h>
 #endif  // defined(OS_WIN)
 
@@ skipping 30 matching lines @@
   remoting::LoadResources("");
 
 #if defined(OS_LINUX)
   // Required in order for us to run multiple X11 threads.
   XInitThreads();
 
   // Required for any calls into GTK functions, such as the Disconnect and
   // Continue windows. Calling with nullptr arguments because we don't have
   // any command line arguments for gtk to consume.
   gtk_init(nullptr, nullptr);
+
+  // Need to prime the host OS version value for linux to prevent IO on the
+  // network thread. base::GetLinuxDistro() caches the result.
+  base::GetLinuxDistro();
 #endif  // OS_LINUX
 
   // Enable support for SSL server sockets, which must be done while still
   // single-threaded.
   net::EnableSSLServerSockets();
 
 #if defined(OS_WIN)
   // GetStdHandle() returns pseudo-handles for stdin and stdout even if
   // the hosting executable specifies "Windows" subsystem. However the returned
   // handles are invalid in that case unless standard input and output are
@@ skipping 51 matching lines @@
   // This object instance is required by Chrome code (such as MessageLoop).
   base::AtExitManager exit_manager;
 
   base::CommandLine::Init(argc, argv);
   remoting::InitHostLogging();
 
   return StartIt2MeNativeMessagingHost();
 }
 
 }  // namespace remoting