Refactor net predictor to use ResourceThrottles

chrome/browser/net/predictor.h

 // 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.
 
 // A Predictor object is instantiated once in the browser process, and manages
 // both preresolution of hostnames, as well as TCP/IP preconnection to expected
 // subresources.
 // Most hostname lists are provided by the renderer processes, and include URLs
 // that *might* be used in the near future by the browsing user.  One goal of
 // this class is to cause the underlying DNS structure to lookup a hostname
@@ skipping 300 matching lines @@
   bool PreconnectEnabled() const;
 
   // Used only for testing. Overrides command line flag to disable preconnect,
   // which is added in the browser test fixture.
   void SetPreconnectEnabledForTest(bool preconnect_enabled);
 
   net::URLRequestContextGetter* url_request_context_getter_for_test() {
     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);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, ReferrerSerializationTrimTest);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, SingleLookupTestWithDisabledAdvisor);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, SingleLookupTestWithEnabledAdvisor);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, TestSimplePreconnectAdvisor);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, NoProxyService);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, ProxyDefinitelyEnabled);
   FRIEND_TEST_ALL_PREFIXES(PredictorTest, ProxyDefinitelyNotEnabled);
@@ skipping 245 matching lines @@
   // List of URLs in referrers_ currently being trimmed (scaled down to
   // eventually be aged out of use).
   std::vector<GURL> urls_being_trimmed_;
 
   // A time after which we need to do more trimming of referrers.
   base::TimeTicks next_trim_time_;
 
   // An observer for testing.
   PredictorObserver* observer_;
 
+  std::unique_ptr<TimedCache> timed_cache_;
+
   std::unique_ptr<base::WeakPtrFactory<Predictor>> weak_factory_;
 
   // Protects |preconnect_enabled_|.
   mutable base::Lock preconnect_enabled_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(Predictor);
 };
 
 // This version of the predictor is used for testing.
 class SimplePredictor : public Predictor {
  public:
   explicit SimplePredictor(bool preconnect_enabled, bool predictor_enabled)
       : Predictor(preconnect_enabled, predictor_enabled) {}
   ~SimplePredictor() override {}
   void InitNetworkPredictor(PrefService* user_prefs,
                             IOThread* io_thread,
                             net::URLRequestContextGetter* getter,
                             ProfileIOData* profile_io_data) override;
   void ShutdownOnUIThread() override;
 
  private:
   // These member functions return True for unittests.
   bool CanPrefetchAndPrerender() const override;
   bool CanPreresolveAndPreconnect() const override;
 };
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_PREDICTOR_H_