Remove two unused prefs keys.

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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.
 
 #include "chrome/browser/prefs/browser_prefs.h"
 
 #include <string>
 
 #include "base/debug/trace_event.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 234 matching lines @@
   chrome_prefs::RegisterPrefs(registry);
   chrome_variations::VariationsService::RegisterPrefs(registry);
   component_updater::RegisterPrefsForRecoveryComponent(registry);
   ExternalProtocolHandler::RegisterPrefs(registry);
   FlagsUI::RegisterPrefs(registry);
   geolocation::RegisterPrefs(registry);
   GLStringManager::RegisterPrefs(registry);
   GpuModeManager::RegisterPrefs(registry);
   IntranetRedirectDetector::RegisterPrefs(registry);
   IOThread::RegisterPrefs(registry);
-  KeywordEditorController::RegisterPrefs(registry);
   network_time::NetworkTimeTracker::RegisterPrefs(registry);
   PrefProxyConfigTrackerImpl::RegisterPrefs(registry);
   ProfileInfoCache::RegisterPrefs(registry);
   profiles::RegisterPrefs(registry);
   PromoResourceService::RegisterPrefs(registry);
   rappor::RapporService::RegisterPrefs(registry);
   RegisterScreenshotPrefs(registry);
   SigninManagerFactory::RegisterPrefs(registry);
   SSLConfigServiceManager::RegisterPrefs(registry);
   UpgradeDetector::RegisterPrefs(registry);
@@ skipping 346 matching lines @@
 #if defined(OS_CHROMEOS)
   chromeos::default_pinned_apps_field_trial::MigratePrefs(local_state);
 #endif
 
 #if defined(TOOLKIT_VIEWS)
   MigrateBrowserTabStripPrefs(local_state);
 #endif
 }
 
 }  // namespace chrome