predictors: Add origin learning.

chrome/browser/predictors/resource_prefetch_common.cc

Index: chrome/browser/predictors/resource_prefetch_common.cc
diff --git a/chrome/browser/predictors/resource_prefetch_common.cc b/chrome/browser/predictors/resource_prefetch_common.cc
index b48bf805120a905a1cc2631773db810fb8f9351f..5fc243b21a9c92ff7a64f072112c2420996216fc 100644
--- a/chrome/browser/predictors/resource_prefetch_common.cc
+++ b/chrome/browser/predictors/resource_prefetch_common.cc
@@ -132,13 +132,14 @@ ResourcePrefetchPredictorConfig::ResourcePrefetchPredictorConfig()
       max_hosts_to_track(200),
       min_url_visit_count(2),
       max_resources_per_entry(50),
+      max_origins_per_entry(50),
       max_consecutive_misses(3),
       min_resource_confidence_to_trigger_prefetch(0.7f),
       min_resource_hits_to_trigger_prefetch(2),
       max_prefetches_inflight_per_navigation(5),
       max_prefetches_inflight_per_host_per_navigation(3),
-      is_url_learning_enabled(false) {
-}
+      is_url_learning_enabled(false),
+      is_origin_prediction_enabled(false) {}

[alexilin, 2017/04/10 14:58:27]

nit:
Could you add the check of default value for |is_origin_prediction_enabled| to
resource_prefetch_common_unittest.cc?
To be precise, the function TestIsDefaultExtraConfig().

[Benoit L, 2017/04/11 09:04:05]

Done.

 
 ResourcePrefetchPredictorConfig::ResourcePrefetchPredictorConfig(
     const ResourcePrefetchPredictorConfig& other) = default;