Batch data use objects in ExternalDataUseObserver

chrome/browser/android/data_usage/external_data_use_reporter.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_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_
 #define CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <deque>
 #include <memory>
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "net/base/network_change_notifier.h"
 
@@ skipping 42 matching lines @@
       const char* field_trial,
       DataUseTabModel* data_use_tab_model,
       ExternalDataUseObserverBridge* external_data_use_observer_bridge);
   virtual ~ExternalDataUseReporter();
 
   void InitOnUIThread();
 
   // Notifies the ExternalDataUseReporter of data usage. The data use is
   // labeled using |data_use_tab_model_|, buffered and then reported to
   // |external_data_use_observer_bridge_| later.
-  void OnDataUse(const data_usage::DataUse& data_use);
+  void OnDataUse(
+      std::unique_ptr<std::deque<const data_usage::DataUse>> data_use_list);

[tbansal1, 2016/07/21 04:40:30]

you can also mark the deque as const which will prevent addition of new objects
to it.
const std::deque

[Raj, 2016/07/21 05:58:22]

Done.

 
   void OnReportDataUseDone(bool success);
 
  private:
   friend class ExternalDataUseReporterTest;
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseReporterTest, BufferDataUseReports);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseReporterTest, BufferSize);
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseReporterTest, DataUseReportTimedOut);
 #if defined(OS_ANDROID)
   FRIEND_TEST_ALL_PREFIXES(ExternalDataUseReporterTest,
@@ skipping 149 matching lines @@
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalDataUseReporter);
 };
 
 }  // namespace android
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_