Snackbar for promoting Data Saver to existing users

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h

 // Copyright 2014 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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 137 matching lines @@
   void IncrementLoFiUserRequestsForImages();
 
   // Records UMA for Lo-Fi implicit opt out actions.
   void RecordLoFiImplicitOptOutAction(
       data_reduction_proxy::LoFiImplicitOptOutAction action) const;
 
   // Returns the time in microseconds that the last update was made to the
   // daily original and received content lengths.
   int64_t GetDataReductionLastUpdateTime();
 
+  // Returns the difference between the total original size of all HTTP content
+  // received from the network and the actual size of the HTTP content received.
+  int64_t GetTotalHttpContentLengthSaved();
+
   // Returns aggregate received and original content lengths over the specified
   // number of days, as well as the time these stats were last updated.
   void GetContentLengths(unsigned int days,
                          int64_t* original_content_length,
                          int64_t* received_content_length,
                          int64_t* last_update_time);
 
   // Records that the data reduction proxy is unreachable or not.
   void SetUnreachable(bool unreachable);
 
@@ skipping 158 matching lines @@
   SyntheticFieldTrialRegistrationCallback register_synthetic_field_trial_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxySettings);
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_