Revert of Use chromeos accelerometer reader and support only lid accelerometer.

chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc

 // Copyright 2014 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/ui/views/athena/chrome_browser_main_extra_parts_athena.h"
 
 #include "athena/env/public/athena_env.h"
 #include "athena/extensions/public/extensions_delegate.h"
 #include "athena/main/public/athena_launcher.h"
 #include "base/command_line.h"
@@ skipping 20 matching lines @@
     registrar_.Add(this,
                    chrome::NOTIFICATION_APP_TERMINATING,
                    content::NotificationService::AllSources());
   }
 
   virtual ~ChromeBrowserMainExtraPartsAthena() {}
 
  private:
   // Overridden from ChromeBrowserMainExtraParts:
   virtual void PreProfileInit() OVERRIDE {
-    athena::StartAthenaEnv(content::BrowserThread::GetBlockingPool()->
-        GetTaskRunnerWithShutdownBehavior(
-            base::SequencedWorkerPool::SKIP_ON_SHUTDOWN));
+    athena::StartAthenaEnv(content::BrowserThread::GetMessageLoopProxyForThread(
+        content::BrowserThread::FILE));
   }
   virtual void PostProfileInit() OVERRIDE {
     if (!CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableZeroBrowsersOpenForTests)) {
       chrome::IncrementKeepAliveCount();
     }
     Profile* profile =
         g_browser_process->profile_manager()->GetActiveUserProfile();
     if (!CommandLine::ForCurrentProcess()->HasSwitch(
             chromeos::switches::kLoginManager)) {
@@ skipping 22 matching lines @@
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsAthena);
 };
 
 }  // namespace
 
 ChromeBrowserMainExtraParts* CreateChromeBrowserMainExtraPartsAthena() {
   return new ChromeBrowserMainExtraPartsAthena();
 }