predictors: Several improvements for redirects database.

chrome/browser/predictors/resource_prefetch_common.h

Index: chrome/browser/predictors/resource_prefetch_common.h
diff --git a/chrome/browser/predictors/resource_prefetch_common.h b/chrome/browser/predictors/resource_prefetch_common.h
index 627dab0754205a7065ce8b62c525c91482ae6d7f..e13e6cc8432fd23b8d9f7f8bb1d47469f0a05b02 100644
--- a/chrome/browser/predictors/resource_prefetch_common.h
+++ b/chrome/browser/predictors/resource_prefetch_common.h
@@ -113,8 +113,12 @@ struct ResourcePrefetchPredictorConfig {
   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 we stop tracking a resource URL.
+  // 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.