Consolidate code monitoring low memory kills and OOM kills to MemoryKillsMonitor on ChromeOS.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 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 "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 336 matching lines @@
                      switches::kLoginProfile).value();
   }
 
 #if defined(GOOGLE_CHROME_BUILD)
   const char kChromeOSReleaseTrack[] = "CHROMEOS_RELEASE_TRACK";
   std::string channel;
   if (base::SysInfo::GetLsbReleaseValue(kChromeOSReleaseTrack, &channel))
     chrome::SetChannel(channel);
 #endif
 
+  // Start monitoring OOM kills.
+  memory_kills_monitor_ = base::MakeUnique<memory::MemoryKillsMonitor::Handle>(
+      memory::MemoryKillsMonitor::StartMonitoring());
+
   ChromeBrowserMainPartsLinux::PreEarlyInitialization();
 }
 
 void ChromeBrowserMainPartsChromeos::PreMainMessageLoopStart() {
   // Replace the default NetworkChangeNotifierFactory with ChromeOS specific
   // implementation. This must be done before BrowserMainLoop calls
   // net::NetworkChangeNotifier::Create() in MainMessageLoopStart().
   net::NetworkChangeNotifier::SetFactory(
       new NetworkChangeNotifierFactoryChromeos());
   ChromeBrowserMainPartsLinux::PreMainMessageLoopStart();
@@ skipping 539 matching lines @@
   // Destroy DBus services immediately after threads are stopped.
   dbus_services_.reset();
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 }  //  namespace chromeos