Don't commit prefs::kStabilitySessionEndCompleted change immediately on chromeos

chrome/browser/browser_process_impl.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/browser_process_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 355 matching lines @@
   // Mark all the profiles as clean.
   ProfileManager* pm = profile_manager();
   std::vector<Profile*> profiles(pm->GetLoadedProfiles());
   for (size_t i = 0; i < profiles.size(); ++i)
     profiles[i]->SetExitType(Profile::EXIT_SESSION_ENDED);
 
   // Tell the metrics service it was cleanly shutdown.
   MetricsService* metrics = g_browser_process->metrics_service();
   if (metrics && local_state()) {
     metrics->RecordStartOfSessionEnd();
-
+#if !defined(OS_CHROMEOS)
     // MetricsService lazily writes to prefs, force it to write now.
+    // On ChromeOS, chrome gets killed when hangs, so no need to
+    // commit prefs::kStabilitySessionEndCompleted change immediately.
     local_state()->CommitPendingWrite();
+#endif
   }
 
   // http://crbug.com/125207
   base::ThreadRestrictions::ScopedAllowWait allow_wait;
 
   // We must write that the profile and metrics service shutdown cleanly,
   // otherwise on startup we'll think we crashed. So we block until done and
   // then proceed with normal shutdown.
 #if defined(USE_X11)
   //  Can't run a local loop on linux. Instead create a waitable event.
@@ skipping 676 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)