Refactor the resource_prefetch_predictor.

chrome/browser/predictors/resource_prefetch_predictor_test_util.h

+// Copyright 2016 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_RESOURCE_PREFETCH_PREDICTOR_TEST_UTIL_H_
+#define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TEST_UTIL_H_
+
+#include "chrome/browser/predictors/resource_prefetch_predictor_tables.h"
+
+namespace predictors {
+
+ResourceData CreateResourceData(const std::string& resource_url,
+                                content::ResourceType resource_type,
+                                int number_of_hits,
+                                int number_of_misses,
+                                int consecutive_misses,
+                                double average_position,
+                                net::RequestPriority priority,
+                                bool has_validators,
+                                bool always_revalidate);
+
+// For printing failures nicely.
+void PrintTo(const ResourceData& resource, ::std::ostream* os);
+void PrintTo(const ResourcePrefetchPredictorTables::PrefetchData& data,
+             ::std::ostream* os);
+
+bool operator==(const ResourceData& lhs, const ResourceData& rhs);
+bool operator==(const ResourcePrefetchPredictorTables::PrefetchData& lhs,
+                const ResourcePrefetchPredictorTables::PrefetchData& rhs);
+
+}  // namespace predictors
+
+#endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TEST_UTIL_H_