Revert of Merge apps/pref* to extensions/browser/pref*

extensions/browser/pref_names.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_PREF_NAMES_H_
 #define EXTENSIONS_BROWSER_PREF_NAMES_H_
 
 #include <string>
 
 #include "extensions/browser/extension_prefs_scope.h"
@@ skipping 18 matching lines @@
 // The sites that are allowed to install extensions. These sites should be
 // allowed to install extensions without the scary dangerous downloads bar.
 // Also, when off-store-extension installs are disabled, these sites are exempt.
 extern const char kAllowedInstallSites[];
 
 // A list of allowed extension types. Extensions can only be installed if their
 // type is on this whitelist or alternatively on kInstallAllowList or
 // kInstallForceList.
 extern const char kAllowedTypes[];
 
-// A boolean that tracks whether apps are allowed to enter fullscreen mode.
-extern const char kAppFullscreenAllowed[];
-
 // Integer which specifies the launch type that bookmark apps are created with
 // by default.
 extern const char kBookmarkAppCreationLaunchType[];
 
 // Dictionary pref that keeps track of per-extension settings. The keys are
 // extension ids.
 extern const char kExtensions[];
 
 // A whitelist of extension ids the user can install: exceptions from the
 // following blacklist.
@@ skipping 54 matching lines @@
 // Extension-set content settings.
 extern const char kPrefContentSettings[];
 
 // Extension-set incognito content settings.
 extern const char kPrefIncognitoContentSettings[];
 
 }  // namespace pref_names
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PREF_NAMES_H_