Refactor net predictor to use ResourceThrottles

chrome/browser/net/predictor.h

Index: chrome/browser/net/predictor.h
diff --git a/chrome/browser/net/predictor.h b/chrome/browser/net/predictor.h
index 300e341ca52b1eb2c869d7f434f91d4db4795870..dfecc80aa8f8b379cdb963c6ac00ca532524e67b 100644
--- a/chrome/browser/net/predictor.h
+++ b/chrome/browser/net/predictor.h
@@ -318,6 +318,8 @@ class Predictor {
     return url_request_context_getter_.get();
   }
 
+  TimedCache* timed_cache() { return timed_cache_.get(); }
+
  private:
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, PriorityQueuePushPopTest);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, PriorityQueueReorderTest);
@@ -583,6 +585,8 @@ class Predictor {
   // An observer for testing.
   PredictorObserver* observer_;
 
+  std::unique_ptr<TimedCache> timed_cache_;
+
   std::unique_ptr<base::WeakPtrFactory<Predictor>> weak_factory_;
 
   // Protects |preconnect_enabled_|.