Revert of Define printer configuration objects for Chrome OS.

chrome/common/pref_names.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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 373 matching lines @@
 
 extern const char kProfileAvatarTutorialShown[];
 extern const char kProfileAvatarRightClickTutorialDismissed[];
 
 extern const char kInvertNotificationShown[];
 
 extern const char kPrintingEnabled[];
 extern const char kPrintPreviewDisabled[];
 extern const char kPrintPreviewDefaultDestinationSelectionRules[];
 
-#if defined(OS_CHROMEOS)
-extern const char kPrintingDevices[];
-#endif  // OS_CHROMEOS
-
 extern const char kDefaultSupervisedUserFilteringBehavior[];
 
 extern const char kSupervisedUserCreationAllowed[];
 extern const char kSupervisedUsers[];
 
 extern const char kMessageCenterDisabledExtensionIds[];
 extern const char kMessageCenterDisabledSystemComponentIds[];
 extern const char kWelcomeNotificationDismissed[];
 extern const char kWelcomeNotificationDismissedLocal[];
 extern const char kWelcomeNotificationPreviouslyPoppedUp[];
@@ skipping 409 matching lines @@
 #endif  // defined(GOOGLE_CHROME_BUILD)
 extern const char kMediaRouterFirstRunFlowAcknowledged[];
 #endif
 
 extern const char kOriginTrialPublicKey[];
 extern const char kOriginTrialDisabledFeatures[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_