Separate data use reporting logic in ExternalDataUseObserver

chrome/browser/android/data_usage/data_use_tab_model.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_DATA_USE_TAB_MODEL_H_
 #define CHROME_BROWSER_ANDROID_DATA_USAGE_DATA_USE_TAB_MODEL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 203 matching lines @@
   // |tab_id|. Protected for testing.
   void NotifyObserversOfTrackingEnding(SessionID::id_type tab_id);
 
   // Notifies the observers that DataUseTabModel is ready to process navigation
   // events.
   void NotifyObserversOfDataUseTabModelReady();
 
  private:
   friend class DataUseTabModelTest;
   friend class ExternalDataUseObserverTest;
+  friend class ExternalDataUseReporterTest;
   friend class TabDataUseEntryTest;
   friend class TestDataUseTabModel;
   FRIEND_TEST_ALL_PREFIXES(DataUseTabModelTest,
                            CompactTabEntriesWithinMaxLimit);
   FRIEND_TEST_ALL_PREFIXES(DataUseTabModelTest,
                            ExpiredInactiveTabEntryRemovaltimeHistogram);
   FRIEND_TEST_ALL_PREFIXES(DataUseTabModelTest,
                            MatchingRuleClearedOnControlAppUninstall);
   FRIEND_TEST_ALL_PREFIXES(DataUseTabModelTest,
                            MultipleObserverMultipleStartEndEvents);
@@ skipping 85 matching lines @@
   base::WeakPtrFactory<DataUseTabModel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DataUseTabModel);
 };
 
 }  // namespace android
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_DATA_USAGE_DATA_USE_TAB_MODEL_H_