Reverting this CL because it was committed before I gave the final LGTM.

chrome/browser/chromeos/chrome_browser_main_chromeos.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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/audio/audio_handler.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/contacts/contact_manager.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/dbus/cros_dbus_service.h"
 #include "chrome/browser/chromeos/display/display_preferences.h"
 #include "chrome/browser/chromeos/display/primary_display_switch_observer.h"
 #include "chrome/browser/chromeos/external_metrics.h"
 #include "chrome/browser/chromeos/imageburner/burn_manager.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
@@ skipping 421 matching lines @@
   // Initialize the brightness observer so that we'll display an onscreen
   // indication of brightness changes during login.
   brightness_observer_.reset(new chromeos::BrightnessObserver());
   output_observer_.reset(new chromeos::OutputObserver());
   resume_observer_.reset(new chromeos::ResumeObserver());
   screen_lock_observer_.reset(new chromeos::ScreenLockObserver());
   if (chromeos::KioskModeSettings::Get()->IsKioskModeEnabled()) {
     power_state_override_.reset(new chromeos::PowerStateOverride(
         chromeos::PowerStateOverride::BLOCK_DISPLAY_SLEEP));
   }
-  magnification_manager_.reset(
-      chromeos::MagnificationManager::CreateInstance());
 
   primary_display_switch_observer_.reset(
       new chromeos::PrimaryDisplaySwitchObserver());
 
   removable_device_notifications_ =
       new chromeos::RemovableDeviceNotificationsCros();
 
   chromeos::NotifyDisplayLocalStatePrefChanged();
 
   ChromeBrowserMainPartsLinux::PostProfileInit();
@@ skipping 64 matching lines @@
   // Tell DeviceSettingsService to stop talking to session_manager.
   chromeos::DeviceSettingsService::Get()->Shutdown();
 
   // We should remove observers attached to D-Bus clients before
   // DBusThreadManager is shut down.
   screen_lock_observer_.reset();
   resume_observer_.reset();
   brightness_observer_.reset();
   output_observer_.reset();
   power_state_override_.reset();
-  magnification_manager_.reset();
 
   // The XInput2 event listener needs to be shut down earlier than when
   // Singletons are finally destroyed in AtExitManager.
   chromeos::XInputHierarchyChangedEventListener::GetInstance()->Stop();
 
   // chromeos::SystemKeyEventListener::Shutdown() is always safe to call,
   // even if Initialize() wasn't called.
   chromeos::SystemKeyEventListener::Shutdown();
   chromeos::imageburner::BurnManager::Shutdown();
   chromeos::AudioHandler::Shutdown();
@@ skipping 58 matching lines @@
       LOG(WARNING) << "low_mem: Part of '100MB' experiment";
       chromeos::LowMemoryObserver::SetLowMemoryMargin(100);
     } else if (trial->group() == margin_200mb) {
       LOG(WARNING) << "low_mem: Part of '200MB' experiment";
       chromeos::LowMemoryObserver::SetLowMemoryMargin(200);
     } else {
       LOG(WARNING) << "low_mem: Part of 'default' experiment";
     }
   }
 }