[Extensions] Remove unused parts of the preferencesPrivate API

extensions/browser/extension_function_histogram_value.h

 // Copyright 2014 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_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 #define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 
 namespace extensions {
 namespace functions {
 
@@ skipping 699 matching lines @@
   MEDIAGALLERIES_GETMETADATA,
   INPUT_IME_SENDKEYEVENTS,
   VIRTUALKEYBOARDPRIVATE_LOCKKEYBOARD,
   SCREENLOCKPRIVATE_SHOWCUSTOMICON,
   INPUT_IME_HIDEINPUTVIEW,
   BOOKMARKMANAGERPRIVATE_UNDO,
   BOOKMARKMANAGERPRIVATE_REDO,
   BOOKMARKMANAGERPRIVATE_UNDOINFO,
   BOOKMARKMANAGERPRIVATE_REDOINFO,
   MEDIAGALLERIES_ADDUSERSELECTEDFOLDER,
-  PREFERENCESPRIVATE_GETSYNCCATEGORIESWITHOUTPASSPHRASE,
+  DELETED_PREFERENCESPRIVATE_GETSYNCCATEGORIESWITHOUTPASSPHRASE,
   DELETED_READINGLISTPRIVATE_ADDENTRY,
   DELETED_READINGLISTPRIVATE_REMOVEENTRY,
   DELETED_READINGLISTPRIVATE_GETENTRIES,
   DELETED_MEDIAGALLERIES_STARTMEDIASCAN,
   DELETED_MEDIAGALLERIES_CANCELMEDIASCAN,
   DELETED_MEDIAGALLERIES_ADDSCANRESULTS,
   LOGPRIVATE_STARTNETINTERNALSWATCH,
   LOGPRIVATE_STOPNETINTERNALSWATCH,
   FILEMANAGERPRIVATE_GETPROFILES,
   DELETED_FILEMANAGERPRIVATE_VISITDESKTOP,
@@ skipping 442 matching lines @@
   INPUT_IME_HIDEWINDOW,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY
 };
 
 }  // namespace functions
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_