Remove TopSites::IsEnabled() as well as related dead code.

chrome/browser/history/top_sites.cc

 // Copyright (c) 2011 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/history/top_sites.h"
 
 #include <algorithm>
 #include <set>
 
 #include "app/l10n_util.h"
@@ skipping 135 matching lines @@
     registrar_.Add(this, NotificationType::NAV_ENTRY_COMMITTED,
                    NotificationService::AllSources());
   }
 
   blacklist_ = profile_->GetPrefs()->
       GetMutableDictionary(prefs::kNTPMostVisitedURLsBlacklist);
   pinned_urls_ = profile_->GetPrefs()->
       GetMutableDictionary(prefs::kNTPMostVisitedPinnedURLs);
 }
 
-// static
-bool TopSites::IsEnabled() {
-  std::string switch_value =
-      CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          switches::kEnableTopSites);
-  return switch_value.empty() || switch_value == "true";
-}
-
 void TopSites::Init(const FilePath& db_name) {
   backend_->Init(db_name);
   backend_->GetMostVisitedThumbnails(
       &cancelable_consumer_,
       NewCallback(this, &TopSites::OnGotMostVisitedThumbnails));
 
   // History may have already finished loading by the time we're created.
   HistoryService* history = profile_->GetHistoryServiceWithoutCreating();
   if (history && history->backend_loaded()) {
     if (history->needs_top_sites_migration())
@@ skipping 736 matching lines @@
   SetTopSites(pages);
 
   // Used only in testing.
   NotificationService::current()->Notify(
       NotificationType::TOP_SITES_UPDATED,
       Source<TopSites>(this),
       Details<CancelableRequestProvider::Handle>(&handle));
 }
 
 }  // namespace history