Turn on component updater on chromeos, only for the pnacl component.

chrome/browser/chrome_browser_main.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.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 462 matching lines @@
   }
 }
 
 void RegisterComponentsForUpdate(const CommandLine& command_line) {
   ComponentUpdateService* cus = g_browser_process->component_updater();
   if (!cus)
     return;
   // Registration can be before of after cus->Start() so it is ok to post
   // a task to the UI thread to do registration once you done the necessary
   // file IO to know you existing component version.
+#if !defined(OS_CHROMEOS)
   RegisterRecoveryComponent(cus, g_browser_process->local_state());
   RegisterPepperFlashComponent(cus);
   RegisterSwiftShaderComponent(cus);
 
   // CRLSetFetcher attempts to load a CRL set from either the local disk or
   // network.
-  if (!command_line.HasSwitch(switches::kDisableCRLSets))
+  if (!command_line.HasSwitch(switches::kDisableCRLSets)
+      && g_browser_process->crl_set_fetcher())
     g_browser_process->crl_set_fetcher()->StartInitialLoad(cus);
+#endif
 
-  RegisterPnaclComponent(cus, command_line);
+  if (g_browser_process->pnacl_component_installer()) {
+    g_browser_process->pnacl_component_installer()->RegisterPnaclComponent(
+        cus, command_line);
+  }
 
   cus->Start();
 }
 
 bool ProcessSingletonNotificationCallback(
     const CommandLine& command_line,
     const base::FilePath& current_directory) {
   // Drop the request if the browser process is already in shutdown path.
   if (!g_browser_process || g_browser_process->IsShuttingDown())
     return false;
@@ skipping 1311 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }