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

athena/main/athena_main.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 "athena/activity/public/activity_factory.h"
 #include "athena/activity/public/activity_manager.h"
 #include "athena/content/public/web_contents_view_delegate_creator.h"
 #include "athena/env/public/athena_env.h"
 #include "athena/extensions/public/extensions_delegate.h"
 #include "athena/main/athena_content_client.h"
@@ skipping 124 matching lines @@
             : kDefaultAppPath);
 
     base::FilePath app_absolute_dir = base::MakeAbsoluteFilePath(app_dir);
     if (base::DirectoryExists(app_absolute_dir)) {
       extensions::ShellExtensionSystem* extension_system =
           static_cast<extensions::ShellExtensionSystem*>(
               extensions::ExtensionSystem::Get(context));
       extension_system->LoadApp(app_absolute_dir);
     }
 
-    athena::StartAthenaEnv(content::BrowserThread::GetBlockingPool()->
-        GetTaskRunnerWithShutdownBehavior(
-            base::SequencedWorkerPool::SKIP_ON_SHUTDOWN));
+    athena::StartAthenaEnv(content::BrowserThread::GetMessageLoopProxyForThread(
+        content::BrowserThread::FILE));
     athena::ExtensionsDelegate::CreateExtensionsDelegateForShell(context);
     athena::CreateVirtualKeyboardWithContext(context);
     athena::StartAthenaSessionWithContext(context);
   }
 
   virtual void Shutdown() OVERRIDE {
     athena::AthenaEnv::Get()->OnTerminating();
     athena::ShutdownAthena();
   }
 
@@ skipping 81 matching lines @@
 
 int main(int argc, const char** argv) {
   AthenaMainDelegate delegate;
   content::ContentMainParams params(&delegate);
 
   params.argc = argc;
   params.argv = argv;
 
   return content::ContentMain(params);
 }