Revert of Delete base/prefs and update callers to use components.

ios/chrome/browser/ssl/ios_ssl_blocking_page.cc

 // Copyright 2016 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/ssl/ios_ssl_blocking_page.h"
 
 #include <utility>
 
 #include "base/metrics/histogram.h"
+#include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
-#include "components/prefs/pref_service.h"
 #include "components/security_interstitials/core/metrics_helper.h"
 #include "components/security_interstitials/core/ssl_error_ui.h"
 #include "ios/chrome/browser/interstitials/ios_chrome_controller_client.h"
 #include "ios/chrome/browser/interstitials/ios_chrome_metrics_helper.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/public/provider/chrome/browser/browser_constants.h"
 #include "ios/public/provider/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "net/base/net_errors.h"
@@ skipping 175 matching lines @@
   callback_.Reset();
 }
 
 // static
 bool IOSSSLBlockingPage::IsOverridable(int options_mask) {
   const bool is_overridable =
       (options_mask & SSLErrorUI::SOFT_OVERRIDE_ENABLED) &&
       !(options_mask & SSLErrorUI::STRICT_ENFORCEMENT);
   return is_overridable;
 }