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

chrome/browser/chromeos/preferences.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_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 84 matching lines @@
 
   PrefService* prefs_;
 
   input_method::InputMethodManager* input_method_manager_;
 
   BooleanPrefMember tap_to_click_enabled_;
   BooleanPrefMember three_finger_click_enabled_;
   BooleanPrefMember natural_scroll_;
   BooleanPrefMember vert_edge_scroll_enabled_;
   BooleanPrefMember accessibility_enabled_;
-  BooleanPrefMember screen_magnifier_enabled_;
-  DoublePrefMember screen_magnifier_scale_;
   IntegerPrefMember speed_factor_;
   IntegerPrefMember mouse_sensitivity_;
   IntegerPrefMember touchpad_sensitivity_;
   BooleanPrefMember primary_mouse_button_right_;
   BooleanPrefMember use_24hour_clock_;
   BooleanPrefMember disable_drive_;
   BooleanPrefMember disable_drive_over_cellular_;
   BooleanPrefMember disable_drive_hosted_files_;
   FilePathPrefMember download_default_directory_;
 
@@ skipping 32 matching lines @@
   BooleanPrefMember enable_screen_lock_;
 
   BooleanPrefMember enable_drm_;
 
   DISALLOW_COPY_AND_ASSIGN(Preferences);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PREFERENCES_H_