predictors: Make ResourcePrefetchPredictor observable.

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 <string>
 
+#include "chrome/browser/predictors/resource_prefetch_predictor.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor_tables.h"
 
 namespace predictors {
 
 void InitializeResourceData(ResourceData* resource,
                             const std::string& resource_url,
                             content::ResourceType resource_type,
                             int number_of_hits,
                             int number_of_misses,
                             int consecutive_misses,
@@ skipping 11 matching lines @@
 PrefetchData CreatePrefetchData(const std::string& primary_key,
                                 uint64_t last_visit_time = 0);
 RedirectData CreateRedirectData(const std::string& primary_key,
                                 uint64_t last_visit_time = 0);
 
 // For printing failures nicely.
 std::ostream& operator<<(std::ostream& stream, const PrefetchData& data);
 std::ostream& operator<<(std::ostream& stream, const ResourceData& resource);
 std::ostream& operator<<(std::ostream& stream, const RedirectData& data);
 std::ostream& operator<<(std::ostream& stream, const RedirectStat& redirect);
+std::ostream& operator<<(
+    std::ostream& stream,
+    const ResourcePrefetchPredictor::PageRequestSummary& summary);
+std::ostream& operator<<(
+    std::ostream& stream,
+    const ResourcePrefetchPredictor::URLRequestSummary& summary);
+std::ostream& operator<<(std::ostream& stream, const NavigationID& id);
 
 bool operator==(const PrefetchData& lhs, const PrefetchData& rhs);
 bool operator==(const ResourceData& lhs, const ResourceData& rhs);
 bool operator==(const RedirectData& lhs, const RedirectData& rhs);
 bool operator==(const RedirectStat& lhs, const RedirectStat& rhs);
+bool operator==(const ResourcePrefetchPredictor::PageRequestSummary& lhs,
+                const ResourcePrefetchPredictor::PageRequestSummary& rhs);
+bool operator==(const ResourcePrefetchPredictor::URLRequestSummary& lhs,
+                const ResourcePrefetchPredictor::URLRequestSummary& rhs);
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_PREDICTOR_TEST_UTIL_H_