Create LoadingDataCollector class and have observers rely on it instead of ResourcePrefetchPredictor

chrome/browser/profiles/profile_io_data.cc

 // Copyright (c) 2012 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/profiles/profile_io_data.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 373 matching lines @@
   params->ssl_config_service = profile->GetSSLConfigService();
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)
   params->extension_info_map =
       extensions::ExtensionSystem::Get(profile)->info_map();
   params->cookie_monster_delegate = new ExtensionCookieMonsterDelegate(profile);
 #endif
 
   if (auto* loading_predictor =
           predictors::LoadingPredictorFactory::GetForProfile(profile)) {
     resource_prefetch_predictor_observer_.reset(

[Benoit L, 2017/05/22 13:37:16]

nit: as you're touching this code, can you convert it to the new hotness,

a_unique_ptr.reset(new FooBar())
--->
a_unique_ptr = base::MakeUnique<FooBar>();

[trevordixon, 2017/05/23 13:05:15]

Done.

         new chrome_browser_net::ResourcePrefetchPredictorObserver(
-            loading_predictor->resource_prefetch_predictor()));
+            loading_predictor->glowplug_collector()));
   }
 
   ProtocolHandlerRegistry* protocol_handler_registry =
       ProtocolHandlerRegistryFactory::GetForBrowserContext(profile);
   DCHECK(protocol_handler_registry);
 
   // The profile instance is only available here in the InitializeOnUIThread
   // method, so we create the url job factory here, then save it for
   // later delivery to the job factory in Init().
   params->protocol_handler_interceptor =
@@ skipping 919 matching lines @@
 void ProfileIOData::SetCookieSettingsForTesting(
     content_settings::CookieSettings* cookie_settings) {
   DCHECK(!cookie_settings_.get());
   cookie_settings_ = cookie_settings;
 }
 
 policy::URLBlacklist::URLBlacklistState ProfileIOData::GetURLBlacklistState(
     const GURL& url) const {
   return url_blacklist_manager_->GetURLBlacklistState(url);
 }