predictors: Disable URL-based learning by default.

chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc

Index: chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc
diff --git a/chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc b/chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc
index bac976786bed6ff7aac17943bca331da9ccc425d..9f3a46aa2e3df7088f46fbc5b48177bc5508f04d 100644
--- a/chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc
+++ b/chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer_unittest.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/page_load_metrics/observers/resource_prefetch_predictor_page_load_metrics_observer.h"
 
+#include <memory>
+
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h"
 #include "chrome/browser/predictors/resource_prefetch_common.h"
@@ -32,7 +34,7 @@ class ResourcePrefetchPredictorPageLoadMetricsObserverTest
   void SetUp() override {
     page_load_metrics::PageLoadMetricsObserverTestHarness::SetUp();
     predictors::ResourcePrefetchPredictorConfig config;
-    config.mode = predictors::ResourcePrefetchPredictorConfig::LEARNING;
+    config.mode = predictors::ResourcePrefetchPredictorConfig::HOST_LEARNING;
     predictor_ =
         base::MakeUnique<testing::StrictMock<MockResourcePrefetchPredictor>>(
             config, profile());