Initialize OSCrypt with a TaskRunner on the main thread

chrome/browser/chrome_browser_main_linux.cc

Index: chrome/browser/chrome_browser_main_linux.cc
diff --git a/chrome/browser/chrome_browser_main_linux.cc b/chrome/browser/chrome_browser_main_linux.cc
index 16808f19c8499302ec4c3b464422847002efee66..bbc21dda1096751ca8a6ed1a508fd021cab61911 100644
--- a/chrome/browser/chrome_browser_main_linux.cc
+++ b/chrome/browser/chrome_browser_main_linux.cc
@@ -62,6 +62,11 @@ void ChromeBrowserMainPartsLinux::PreProfileInit() {
       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();