Index: chrome/browser/predictors/loading_predictor_config.h |
diff --git a/chrome/browser/predictors/loading_predictor_config.h b/chrome/browser/predictors/loading_predictor_config.h |
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+// Copyright 2017 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. |
+ |
+#ifndef CHROME_BROWSER_PREDICTORS_LOADING_PREDICTOR_CONFIG_H_ |
+#define CHROME_BROWSER_PREDICTORS_LOADING_PREDICTOR_CONFIG_H_ |
+ |
+#include <cstddef> |
+ |
+class Profile; |
+ |
+namespace predictors { |
+ |
+struct LoadingPredictorConfig; |
+ |
+// Returns whether the predictor is enabled, and populates |config|, if not |
+// nullptr. |
+bool IsLoadingPredictortEnabled(Profile* profile, |
+ LoadingPredictorConfig* config); |
+ |
+// Indicates what caused the page load hint. |
+enum class HintOrigin { NAVIGATION, EXTERNAL }; |
+ |
+// Represents the config for the Loading predictor. |
+struct LoadingPredictorConfig { |
+ // Initializes the config with default values. |
+ LoadingPredictorConfig(); |
+ LoadingPredictorConfig(const LoadingPredictorConfig& other); |
+ ~LoadingPredictorConfig(); |
+ |
+ // The mode the prefetcher is running in. Forms a bit map. |
+ enum Mode { |
+ LEARNING = 1 << 0, |
+ PREFETCHING_FOR_NAVIGATION = 1 << 2, // Should also turn on LEARNING. |
+ PREFETCHING_FOR_EXTERNAL = 1 << 3 // Should also turn on LEARNING. |
+ }; |
+ int mode; |
+ |
+ // Helpers to deal with mode. |
+ bool IsLearningEnabled() const; |
+ bool IsPrefetchingEnabledForSomeOrigin(Profile* profile) const; |
+ bool IsPrefetchingEnabledForOrigin(Profile* profile, HintOrigin origin) const; |
+ |
+ bool IsLowConfidenceForTest() const; |
+ bool IsHighConfidenceForTest() const; |
+ bool IsMoreResourcesEnabledForTest() const; |
+ bool IsSmallDBEnabledForTest() const; |
+ |
+ // If a navigation hasn't seen a load complete event in this much time, it |
+ // is considered abandoned. |
+ size_t max_navigation_lifetime_seconds; |
+ |
+ // Size of LRU caches for the URL and host data. |
+ size_t max_urls_to_track; |
+ size_t max_hosts_to_track; |
+ |
+ // The number of times we should have seen a visit to this URL in history |
+ // to start tracking it. This is to ensure we don't bother with oneoff |
+ // entries. For hosts we track each one. |
+ size_t min_url_visit_count; |
+ |
+ // The maximum number of resources to store per entry. |
+ size_t max_resources_per_entry; |
+ // The maximum number of origins to store per entry. |
+ size_t max_origins_per_entry; |
+ // The number of consecutive misses after which we stop tracking a resource |
+ // URL. |
+ size_t max_consecutive_misses; |
+ // The number of consecutive misses after which we stop tracking a redirect |
+ // endpoint. |
+ size_t max_redirect_consecutive_misses; |
+ |
+ // The minimum confidence (accuracy of hits) required for a resource to be |
+ // prefetched. |
+ float min_resource_confidence_to_trigger_prefetch; |
+ // The minimum number of times we must have a URL on record to prefetch it. |
+ size_t min_resource_hits_to_trigger_prefetch; |
+ |
+ // Maximum number of prefetches that can be inflight for a single navigation. |
+ size_t max_prefetches_inflight_per_navigation; |
+ // Maximum number of prefetches that can be inflight for a host for a single |
+ // navigation. |
+ size_t max_prefetches_inflight_per_host_per_navigation; |
+ // True iff the predictor could use a url-based database. |
+ bool is_url_learning_enabled; |
+ // True iff the predictor could use manifests. |
+ bool is_manifests_enabled; |
+ // True iff origin-based learning is enabled. |
+ bool is_origin_learning_enabled; |
+}; |
+ |
+} // namespace predictors |
+ |
+#endif // CHROME_BROWSER_PREDICTORS_LOADING_PREDICTOR_CONFIG_H_ |