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

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 07256da2a74cef75e741045a1dd68a8c68506e5b..40678b48f612a4e82355df10fd38929957d5b6d4 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -393,7 +393,7 @@ void ProfileIOData::InitializeOnUIThread(Profile* profile) {
           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 =