Move MemoryPressureObserverChromeOS instantiation from Chrome to Content

chrome/browser/chromeos/chrome_browser_main_chromeos.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_
 #define CHROME_BROWSER_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "chrome/browser/chrome_browser_main_linux.h"
 #include "chrome/browser/chromeos/external_metrics.h"
 #include "chrome/browser/chromeos/version_loader.h"
 
-namespace base {
-class MemoryPressureObserverChromeOS;
-}
-
 namespace content {
 class PowerSaveBlocker;
 }
 
 namespace session_manager {
 class SessionManager;
 }
 
 namespace chromeos {
 
@@ skipping 55 matching lines @@
   scoped_ptr<WakeOnWifiManager> wake_on_wifi_manager_;
 
   scoped_ptr<internal::DBusServices> dbus_services_;
 
   scoped_ptr<session_manager::SessionManager> session_manager_;
 
   scoped_ptr<EventRewriterController> keyboard_event_rewriters_;
 
   scoped_refptr<chromeos::ExternalMetrics> external_metrics_;
 
-  scoped_ptr<base::MemoryPressureObserverChromeOS> memory_pressure_observer_;
-
   bool use_new_network_change_notifier_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsChromeos);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_