Clean up IconNTP-related code

components/favicon/core/favicon_driver_impl.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 "components/favicon/core/favicon_driver_impl.h"
 
-#include "base/command_line.h"
 #include "base/logging.h"
-#include "base/metrics/field_trial.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/favicon/core/favicon_driver_observer.h"
 #include "components/favicon/core/favicon_handler.h"
 #include "components/favicon/core/favicon_service.h"
 #include "components/history/core/browser/history_service.h"
-#include "ui/base/ui_base_switches.h"
 
 namespace favicon {
 namespace {
 
-// Returns whether icon NTP is enabled by experiment.
-// TODO(huangs): Remove all 3 copies of this routine once Icon NTP launches.
-bool IsIconNTPEnabled() {
-  // Note: It's important to query the field trial state first, to ensure that
-  // UMA reports the correct group.
-  const std::string group_name = base::FieldTrialList::FindFullName("IconNTP");
-  using base::CommandLine;
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableIconNtp))
-    return false;
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableIconNtp))
-    return true;
-
-  return base::StartsWith(group_name, "Enabled", base::CompareCase::SENSITIVE);
-}
-
 #if defined(OS_ANDROID) || defined(OS_IOS)
 const bool kEnableTouchIcon = true;
 #else
 const bool kEnableTouchIcon = false;
 #endif
 
 }  // namespace
 
 FaviconDriverImpl::FaviconDriverImpl(FaviconService* favicon_service,
                                      history::HistoryService* history_service,
                                      bookmarks::BookmarkModel* bookmark_model)
     : favicon_service_(favicon_service),
       history_service_(history_service),
       bookmark_model_(bookmark_model) {
   favicon_handler_.reset(new FaviconHandler(
       favicon_service_, this, kEnableTouchIcon
                                   ? FaviconDriverObserver::NON_TOUCH_LARGEST
                                   : FaviconDriverObserver::NON_TOUCH_16_DIP));
-  if (kEnableTouchIcon || IsIconNTPEnabled()) {
+  if (kEnableTouchIcon) {
     touch_icon_handler_.reset(new FaviconHandler(
         favicon_service_, this, FaviconDriverObserver::TOUCH_LARGEST));
   }
 }
 
 FaviconDriverImpl::~FaviconDriverImpl() {
 }
 
 void FaviconDriverImpl::FetchFavicon(const GURL& url) {
   favicon_handler_->FetchFavicon(url);
@@ skipping 49 matching lines @@
 void FaviconDriverImpl::OnUpdateFaviconURL(
     const GURL& page_url,
     const std::vector<FaviconURL>& candidates) {
   DCHECK(!candidates.empty());
   favicon_handler_->OnUpdateFaviconURL(page_url, candidates);
   if (touch_icon_handler_.get())
     touch_icon_handler_->OnUpdateFaviconURL(page_url, candidates);
 }
 
 }  // namespace favicon