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

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 552bcad320a1ddf64d0bd24ed891c8cfc543ca96..6f8229b962e796c419680a7072959c29f2c234b4 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1898,18 +1898,6 @@ const char kFactoryResetRequested[] = "FactoryResetRequested";
 // Indicates that debugging features were requested from oobe screen.
 const char kDebuggingFeaturesRequested[] = "DebuggingFeaturesRequested";
 
-// Boolean recording whether we have showed a balloon that calls out the message
-// center for desktop notifications.
-const char kMessageCenterShowedFirstRunBalloon[] =
-    "message_center.showed_first_run_balloon";
-
-// Boolean recording whether the user has disabled the notifications
-// menubar or systray icon.
-const char kMessageCenterShowIcon[] = "message_center.show_icon";
-
-const char kMessageCenterForcedOnTaskbar[] =
-    "message_center.was_forced_on_taskbar";
-
 #if defined(OS_CHROMEOS)
 // This setting starts periodic timezone refresh when not in user session.
 // (user session is controlled by user profile preference