MD History: Add routing for grouped history mode.

chrome/browser/ui/webui/md_history_ui.cc

 // Copyright 2015 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/ui/webui/md_history_ui.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 225 matching lines @@
 
   web_ui->RegisterMessageCallback("menuPromoShown",
       base::Bind(&MdHistoryUI::HandleMenuPromoShown, base::Unretained(this)));
 }
 
 MdHistoryUI::~MdHistoryUI() {}
 
 // static
 bool MdHistoryUI::IsEnabled(Profile* profile) {
   return base::FeatureList::IsEnabled(features::kMaterialDesignHistory) &&
-         !base::CommandLine::ForCurrentProcess()->HasSwitch(
-             switches::kHistoryEnableGroupByDomain) &&
          !profile->IsSupervised();
 }
 
 // static
 base::RefCountedMemory* MdHistoryUI::GetFaviconResourceBytes(
     ui::ScaleFactor scale_factor) {
   return ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
       IDR_HISTORY_FAVICON, scale_factor);
 }
 
@@ skipping 14 matching lines @@
 
   content::WebUIDataSource::Update(profile, chrome::kChromeUIHistoryHost,
                                    std::move(update));
 }
 
 void MdHistoryUI::HandleMenuPromoShown(const base::ListValue* args) {
   Profile::FromWebUI(web_ui())->GetPrefs()->SetBoolean(
       prefs::kMdHistoryMenuPromoShown, true);
   UpdateDataSource();
 }