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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // A Predictor object is instantiated once in the browser process, and manages | 5 // A Predictor object is instantiated once in the browser process, and manages |
| 6 // both preresolution of hostnames, as well as TCP/IP preconnection to expected | 6 // both preresolution of hostnames, as well as TCP/IP preconnection to expected |
| 7 // subresources. | 7 // subresources. |
| 8 // Most hostname lists are provided by the renderer processes, and include URLs | 8 // Most hostname lists are provided by the renderer processes, and include URLs |
| 9 // that *might* be used in the near future by the browsing user. One goal of | 9 // that *might* be used in the near future by the browsing user. One goal of |
| 10 // this class is to cause the underlying DNS structure to lookup a hostname | 10 // this class is to cause the underlying DNS structure to lookup a hostname |
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| 510 | 510 |
| 511 // Reference to URLRequestContextGetter from the Profile which owns the | 511 // Reference to URLRequestContextGetter from the Profile which owns the |
| 512 // predictor. Used by Preconnect. | 512 // predictor. Used by Preconnect. |
| 513 scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_; | 513 scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_; |
| 514 | 514 |
| 515 // Status of speculative DNS resolution and speculative TCP/IP connection | 515 // Status of speculative DNS resolution and speculative TCP/IP connection |
| 516 // feature. This is false if and only if disabled by a command line switch. | 516 // feature. This is false if and only if disabled by a command line switch. |
| 517 const bool predictor_enabled_; | 517 const bool predictor_enabled_; |
| 518 | 518 |
| 519 // This is set by InitNetworkPredictor and used for calling | 519 // This is set by InitNetworkPredictor and used for calling |
| 520 // chrome_browser_net::CanPredictNetworkActionsUI. | 520 // CanPrefetchAndPrerenderUI and CanPreresolveAndPreconnectUI. |
| 521 PrefService* user_prefs_; | 521 PrefService* user_prefs_; |
| 522 | 522 |
| 523 // This is set by InitNetworkPredictor and used for calling | 523 // This is set by InitNetworkPredictor and used for calling |
| 524 // chrome_browser_net::CanPredictNetworkActionsIO. | 524 // CanPrefetchAndPrerenderIO and CanPreresolveAndPreconnectIO. |
| 525 ProfileIOData* profile_io_data_; | 525 ProfileIOData* profile_io_data_; |
| 526 | 526 |
| 527 // work_queue_ holds a list of names we need to look up. | 527 // work_queue_ holds a list of names we need to look up. |
| 528 HostNameQueue work_queue_; | 528 HostNameQueue work_queue_; |
| 529 | 529 |
| 530 // results_ contains information for existing/prior prefetches. | 530 // results_ contains information for existing/prior prefetches. |
| 531 Results results_; | 531 Results results_; |
| 532 | 532 |
| 533 std::set<LookupRequest*> pending_lookups_; | 533 std::set<LookupRequest*> pending_lookups_; |
| 534 | 534 |
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| 614 virtual void ShutdownOnUIThread() OVERRIDE; | 614 virtual void ShutdownOnUIThread() OVERRIDE; |
| 615 private: | 615 private: |
| 616 // These member functions return True for unittests. | 616 // These member functions return True for unittests. |
| 617 virtual bool CanPrefetchAndPrerender() const OVERRIDE; | 617 virtual bool CanPrefetchAndPrerender() const OVERRIDE; |
| 618 virtual bool CanPreresolveAndPreconnect() const OVERRIDE; | 618 virtual bool CanPreresolveAndPreconnect() const OVERRIDE; |
| 619 }; | 619 }; |
| 620 | 620 |
| 621 } // namespace chrome_browser_net | 621 } // namespace chrome_browser_net |
| 622 | 622 |
| 623 #endif // CHROME_BROWSER_NET_PREDICTOR_H_ | 623 #endif // CHROME_BROWSER_NET_PREDICTOR_H_ |
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