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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 #include "chrome/browser/prerender/prerender_manager.h" | 5 #include "chrome/browser/prerender/prerender_manager.h" |
6 | 6 |
7 #include <string> | 7 #include <string> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/bind_helpers.h" | 10 #include "base/bind_helpers.h" |
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408 | 408 |
409 // Try to set the prerendered page as used, so any subsequent attempts to | 409 // Try to set the prerendered page as used, so any subsequent attempts to |
410 // cancel on other threads will fail. If this fails because the prerender | 410 // cancel on other threads will fail. If this fails because the prerender |
411 // was already cancelled, possibly on another thread, fail. | 411 // was already cancelled, possibly on another thread, fail. |
412 if (!prerender_tracker_->TryUse(child_id, route_id)) | 412 if (!prerender_tracker_->TryUse(child_id, route_id)) |
413 return false; | 413 return false; |
414 | 414 |
415 if (!prerender_contents->load_start_time().is_null()) { | 415 if (!prerender_contents->load_start_time().is_null()) { |
416 histograms_->RecordTimeUntilUsed(GetCurrentTimeTicks() - | 416 histograms_->RecordTimeUntilUsed(GetCurrentTimeTicks() - |
417 prerender_contents->load_start_time(), | 417 prerender_contents->load_start_time(), |
418 config_.max_age); | 418 GetMaxAge()); |
419 } | 419 } |
420 | 420 |
421 histograms_->RecordPerSessionCount(++prerenders_per_session_count_); | 421 histograms_->RecordPerSessionCount(++prerenders_per_session_count_); |
422 histograms_->RecordUsedPrerender(prerender_contents->origin()); | 422 histograms_->RecordUsedPrerender(prerender_contents->origin()); |
423 prerender_contents->set_final_status(FINAL_STATUS_USED); | 423 prerender_contents->set_final_status(FINAL_STATUS_USED); |
424 | 424 |
425 new_render_view_host->Send( | 425 new_render_view_host->Send( |
426 new ChromeViewMsg_SetIsPrerendering(new_render_view_host->routing_id(), | 426 new ChromeViewMsg_SetIsPrerendering(new_render_view_host->routing_id(), |
427 false)); | 427 false)); |
428 | 428 |
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584 return mode_; | 584 return mode_; |
585 } | 585 } |
586 | 586 |
587 // static | 587 // static |
588 void PrerenderManager::SetMode(PrerenderManagerMode mode) { | 588 void PrerenderManager::SetMode(PrerenderManagerMode mode) { |
589 mode_ = mode; | 589 mode_ = mode; |
590 } | 590 } |
591 | 591 |
592 // static | 592 // static |
593 bool PrerenderManager::IsPrerenderingPossible() { | 593 bool PrerenderManager::IsPrerenderingPossible() { |
594 return GetMode() == PRERENDER_MODE_ENABLED || | 594 return GetMode() != PRERENDER_MODE_DISABLED; |
595 GetMode() == PRERENDER_MODE_EXPERIMENT_PRERENDER_GROUP || | |
596 GetMode() == PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP || | |
597 GetMode() == PRERENDER_MODE_EXPERIMENT_NO_USE_GROUP; | |
598 } | 595 } |
599 | 596 |
600 // static | 597 // static |
601 bool PrerenderManager::ActuallyPrerendering() { | 598 bool PrerenderManager::ActuallyPrerendering() { |
602 return IsPrerenderingPossible() && !IsControlGroup(); | 599 return IsPrerenderingPossible() && !IsControlGroup(); |
603 } | 600 } |
604 | 601 |
605 // static | 602 // static |
606 bool PrerenderManager::IsControlGroup() { | 603 bool PrerenderManager::IsControlGroup() { |
607 return GetMode() == PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP; | 604 return GetMode() == PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP; |
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717 } | 714 } |
718 | 715 |
719 DictionaryValue* PrerenderManager::GetAsValue() const { | 716 DictionaryValue* PrerenderManager::GetAsValue() const { |
720 DCHECK(CalledOnValidThread()); | 717 DCHECK(CalledOnValidThread()); |
721 DictionaryValue* dict_value = new DictionaryValue(); | 718 DictionaryValue* dict_value = new DictionaryValue(); |
722 dict_value->Set("history", prerender_history_->GetEntriesAsValue()); | 719 dict_value->Set("history", prerender_history_->GetEntriesAsValue()); |
723 dict_value->Set("active", GetActivePrerendersAsValue()); | 720 dict_value->Set("active", GetActivePrerendersAsValue()); |
724 dict_value->SetBoolean("enabled", enabled_); | 721 dict_value->SetBoolean("enabled", enabled_); |
725 dict_value->SetBoolean("omnibox_enabled", IsOmniboxEnabled(profile_)); | 722 dict_value->SetBoolean("omnibox_enabled", IsOmniboxEnabled(profile_)); |
726 // If prerender is disabled via a flag this method is not even called. | 723 // If prerender is disabled via a flag this method is not even called. |
| 724 std::string enabled_note; |
727 if (IsControlGroup()) | 725 if (IsControlGroup()) |
728 dict_value->SetString("disabled_reason", "(Disabled for testing)"); | 726 enabled_note += "(Control group: Not actually prerendering) "; |
729 if (IsNoUseGroup()) | 727 if (IsNoUseGroup()) |
730 dict_value->SetString("disabled_reason", "(Not using prerendered pages)"); | 728 enabled_note += "(No-use group: Not swapping in prerendered pages) "; |
| 729 if (GetMode() == PRERENDER_MODE_EXPERIMENT_5MIN_TTL_GROUP) |
| 730 enabled_note += "(5 min TTL group: Extended prerender eviction to 5 mins) "; |
| 731 dict_value->SetString("enabled_note", enabled_note); |
731 return dict_value; | 732 return dict_value; |
732 } | 733 } |
733 | 734 |
734 void PrerenderManager::ClearData(int clear_flags) { | 735 void PrerenderManager::ClearData(int clear_flags) { |
735 DCHECK_GE(clear_flags, 0); | 736 DCHECK_GE(clear_flags, 0); |
736 DCHECK_LT(clear_flags, CLEAR_MAX); | 737 DCHECK_LT(clear_flags, CLEAR_MAX); |
737 if (clear_flags & CLEAR_PRERENDER_CONTENTS) | 738 if (clear_flags & CLEAR_PRERENDER_CONTENTS) |
738 DestroyAllContents(FINAL_STATUS_CACHE_OR_HISTORY_CLEARED); | 739 DestroyAllContents(FINAL_STATUS_CACHE_OR_HISTORY_CLEARED); |
739 // This has to be second, since destroying prerenders can add to the history. | 740 // This has to be second, since destroying prerenders can add to the history. |
740 if (clear_flags & CLEAR_PRERENDER_HISTORY) | 741 if (clear_flags & CLEAR_PRERENDER_HISTORY) |
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977 } | 978 } |
978 | 979 |
979 void PrerenderManager::PostCleanupTask() { | 980 void PrerenderManager::PostCleanupTask() { |
980 DCHECK(CalledOnValidThread()); | 981 DCHECK(CalledOnValidThread()); |
981 MessageLoop::current()->PostTask( | 982 MessageLoop::current()->PostTask( |
982 FROM_HERE, | 983 FROM_HERE, |
983 base::Bind(&PrerenderManager::PeriodicCleanup, | 984 base::Bind(&PrerenderManager::PeriodicCleanup, |
984 weak_factory_.GetWeakPtr())); | 985 weak_factory_.GetWeakPtr())); |
985 } | 986 } |
986 | 987 |
| 988 base::TimeDelta PrerenderManager::GetMaxAge() const { |
| 989 return (GetMode() == PRERENDER_MODE_EXPERIMENT_5MIN_TTL_GROUP ? |
| 990 base::TimeDelta::FromSeconds(300) : config_.max_age); |
| 991 } |
| 992 |
987 bool PrerenderManager::IsPrerenderElementFresh(const base::Time start) const { | 993 bool PrerenderManager::IsPrerenderElementFresh(const base::Time start) const { |
988 DCHECK(CalledOnValidThread()); | 994 DCHECK(CalledOnValidThread()); |
989 base::Time now = GetCurrentTime(); | 995 base::Time now = GetCurrentTime(); |
990 return (now - start < config_.max_age); | 996 return (now - start < GetMaxAge()); |
991 } | 997 } |
992 | 998 |
993 void PrerenderManager::DeleteOldEntries() { | 999 void PrerenderManager::DeleteOldEntries() { |
994 DCHECK(CalledOnValidThread()); | 1000 DCHECK(CalledOnValidThread()); |
995 while (!prerender_list_.empty()) { | 1001 while (!prerender_list_.empty()) { |
996 PrerenderContentsData data = prerender_list_.front(); | 1002 PrerenderContentsData data = prerender_list_.front(); |
997 if (IsPrerenderElementFresh(data.start_time_)) | 1003 if (IsPrerenderElementFresh(data.start_time_)) |
998 return; | 1004 return; |
999 data.contents_->Destroy(FINAL_STATUS_TIMED_OUT); | 1005 data.contents_->Destroy(FINAL_STATUS_TIMED_OUT); |
1000 } | 1006 } |
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1194 if (!render_process_host || !render_process_host->GetBrowserContext()) | 1200 if (!render_process_host || !render_process_host->GetBrowserContext()) |
1195 return NULL; | 1201 return NULL; |
1196 Profile* profile = Profile::FromBrowserContext( | 1202 Profile* profile = Profile::FromBrowserContext( |
1197 render_process_host->GetBrowserContext()); | 1203 render_process_host->GetBrowserContext()); |
1198 if (!profile) | 1204 if (!profile) |
1199 return NULL; | 1205 return NULL; |
1200 return PrerenderManagerFactory::GetInstance()->GetForProfile(profile); | 1206 return PrerenderManagerFactory::GetInstance()->GetForProfile(profile); |
1201 } | 1207 } |
1202 | 1208 |
1203 } // namespace prerender | 1209 } // namespace prerender |
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