Buffer UI navigation events in DataUseTabModel until rule fetch

chrome/browser/android/data_usage/external_data_use_observer.h

 // Copyright 2015 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_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_OBSERVER_H_
 #define CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_OBSERVER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 91 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
                            DataUseReportingOnApplicationStatusChange);
 #endif
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest, HashFunction);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
                            MatchingRuleFetchOnControlAppInstall);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest, MultipleMatchingRules);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
                            PeriodicFetchMatchingRules);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
+                           ProcessBufferedNavigationEvents);
+  FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
                            RegisteredAsDataUseObserver);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest, ReportsMergedCorrectly);
   FRIEND_TEST_ALL_PREFIXES(DataUseUITabModelTest, ReportTabEventsTest);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest,
                            TimestampsMergedCorrectly);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseObserverTest, Variations);
 
   // DataUseReportKey is a unique identifier for a data use report.
   struct DataUseReportKey {
     DataUseReportKey(const std::string& label,
@@ skipping 157 matching lines @@
   base::WeakPtrFactory<ExternalDataUseObserver> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalDataUseObserver);
 };
 
 }  // namespace android
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_OBSERVER_H_