Simplify security_interstitials::ControllerClient and other related classes

ios/chrome/browser/interstitials/ios_security_interstitial_page.mm

 // 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 "ios/chrome/browser/interstitials/ios_security_interstitial_page.h"
 
 #include "base/logging.h"
 #include "components/grit/components_resources.h"
 #include "components/prefs/pref_service.h"
 #include "components/security_interstitials/core/common_string_util.h"
-#include "components/security_interstitials/core/metrics_helper.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#include "ios/chrome/browser/interstitials/ios_chrome_controller_client.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/web/public/interstitials/web_interstitial.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
 #include "ui/base/webui/web_ui_util.h"
 
 IOSSecurityInterstitialPage::IOSSecurityInterstitialPage(
     web::WebState* web_state,
     const GURL& request_url)
@@ skipping 30 matching lines @@
 base::string16 IOSSecurityInterstitialPage::GetFormattedHostName() const {
   return security_interstitials::common_string_util::GetFormattedHostName(
       request_url_);
 }
 
 bool IOSSecurityInterstitialPage::IsPrefEnabled(const char* pref_name) const {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(web_state_->GetBrowserState());
   return browser_state->GetPrefs()->GetBoolean(pref_name);
 }