[predictor] Apply HSTS redirects when learning referrers.

chrome/browser/net/predictor.cc

Index: chrome/browser/net/predictor.cc
diff --git a/chrome/browser/net/predictor.cc b/chrome/browser/net/predictor.cc
index 4904ec17df74b39a597568dc356f7dc0ebe1bef6..0ef21599629dc765f3a164e184f7b2e8969d8574 100644
--- a/chrome/browser/net/predictor.cc
+++ b/chrome/browser/net/predictor.cc
@@ -472,9 +472,12 @@ void Predictor::LearnFromNavigation(const GURL& referring_url,
   DCHECK_EQ(target_url, Predictor::CanonicalizeUrl(target_url));
   DCHECK_NE(target_url, GURL::EmptyGURL());
 
+  // Skip HSTS redirects to learn the true referrer.
+  GURL referring_url_with_hsts = GetHSTSRedirectOnIOThread(referring_url);
+
   if (observer_)
-    observer_->OnLearnFromNavigation(referring_url, target_url);
-  referrers_[referring_url].SuggestHost(target_url);
+    observer_->OnLearnFromNavigation(referring_url_with_hsts, target_url);
+  referrers_[referring_url_with_hsts].SuggestHost(target_url);
   // Possibly do some referrer trimming.
   TrimReferrers();
 }