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

chrome/browser/dom_ui/dom_ui_thumbnail_source.cc

 // Copyright (c) 2010 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/dom_ui/dom_ui_thumbnail_source.h"
 
 #include "app/resource_bundle.h"
 #include "base/callback.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 #include "grit/theme_resources.h"
 
 DOMUIThumbnailSource::DOMUIThumbnailSource(Profile* profile)
     : DataSource(chrome::kChromeUIThumbnailPath, MessageLoop::current()),
       profile_(profile) {
-  if (history::TopSites::IsEnabled()) {
-    // Set TopSites now as Profile isn't thread safe.
-    top_sites_ = profile_->GetTopSites();
-  }
+  // Set TopSites now as Profile isn't thread safe.
+  top_sites_ = profile_->GetTopSites();
 }
 
 DOMUIThumbnailSource::~DOMUIThumbnailSource() {
 }
 
 void DOMUIThumbnailSource::StartDataRequest(const std::string& path,
                                             bool is_off_the_record,
                                             int request_id) {
   if (top_sites_.get()) {
     scoped_refptr<RefCountedBytes> data;
@@ skipping 46 matching lines @@
     HistoryService::Handle request_handle,
     scoped_refptr<RefCountedBytes> data) {
   int request_id = cancelable_consumer_.GetClientDataForCurrentRequest();
   // Forward the data along to the networking system.
   if (data.get() && !data->data.empty()) {
     SendResponse(request_id, data);
   } else {
     SendDefaultThumbnail(request_id);
   }
 }