Initialize OSCrypt with a TaskRunner on the main thread

chrome/browser/chrome_browser_main_linux.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 "chrome/browser/chrome_browser_main_linux.h"
 
 #include <fontconfig/fontconfig.h>
 
 #include <string>
 
@@ skipping 44 matching lines @@
 
   media::AudioManager::SetGlobalAppName(
       l10n_util::GetStringUTF8(IDS_SHORT_PRODUCT_NAME));
 
 #if !defined(OS_CHROMEOS)
   // Forward to os_crypt the flag to use a specific password store.
   OSCrypt::SetStore(
       parsed_command_line().GetSwitchValueASCII(switches::kPasswordStore));
   // Forward the product name
   OSCrypt::SetProductName(l10n_util::GetStringUTF8(IDS_PRODUCT_NAME));
+  // OSCrypt may target keyring, which requires calls from the main thread.
+  scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner(
+      content::BrowserThread::GetTaskRunnerForThread(
+          content::BrowserThread::UI));
+  OSCrypt::SetMainThreadRunner(main_thread_runner);
 #endif
 
   ChromeBrowserMainPartsPosix::PreProfileInit();
 }
 
 void ChromeBrowserMainPartsLinux::PostProfileInit() {
   ChromeBrowserMainPartsPosix::PostProfileInit();
 
   g_browser_process->metrics_service()->RecordBreakpadRegistration(
       breakpad::IsCrashReporterEnabled());
@@ skipping 10 matching lines @@
 }
 
 void ChromeBrowserMainPartsLinux::PostDestroyThreads() {
 #if !defined(OS_CHROMEOS)
   bluez::BluezDBusManager::Shutdown();
   bluez::DBusThreadManagerLinux::Shutdown();
 #endif
 
   ChromeBrowserMainPartsPosix::PostDestroyThreads();
 }