[Eraser] First pass at removing the notification center panel.

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 695 matching lines @@
 
 extern const char kBackgroundModeEnabled[];
 extern const char kHardwareAccelerationModeEnabled[];
 extern const char kHardwareAccelerationModePrevious[];
 
 extern const char kDevicePolicyRefreshRate[];
 
 extern const char kFactoryResetRequested[];
 extern const char kDebuggingFeaturesRequested[];
 
-extern const char kMessageCenterShowedFirstRunBalloon[];
-extern const char kMessageCenterShowIcon[];
-extern const char kMessageCenterForcedOnTaskbar[];
-
 #if defined(OS_CHROMEOS)
 extern const char kResolveDeviceTimezoneByGeolocation[];
 #endif  // defined(OS_CHROMEOS)
 
 extern const char kAttemptedToEnableAutoupdate[];
 
 extern const char kMediaGalleriesUniqueId[];
 extern const char kMediaGalleriesRememberedGalleries[];
 extern const char kMediaGalleriesLastScanTime[];
 
@@ skipping 85 matching lines @@
 
 #if defined(ENABLE_EXTENSIONS)
 extern const char kAnimationPolicy[];
 #endif
 
 extern const char kBackgroundTracingLastUpload[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_