Control data saver pingback reporting fraction with protobuf

components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
index 0e3d1b2774f2048be159155124e47ee75856e8ce..1f13bff0e67e1d475c7f63024719328f73c099de 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
@@ -130,20 +130,23 @@ class DataReductionProxyService
   void LoadCurrentDataUsageBucket(
       const LoadCurrentDataUsageCallback& load_current_data_usage_callback);
   void StoreCurrentDataUsageBucket(std::unique_ptr<DataUsageBucket> current);
   void DeleteHistoricalDataUsage();
   void DeleteBrowsingHistory(const base::Time& start, const base::Time& end);
 
   // Methods for adding/removing observers on |this|.
   void AddObserver(DataReductionProxyServiceObserver* observer);
   void RemoveObserver(DataReductionProxyServiceObserver* observer);
 
+  // Sets the reporting fraction in the pingback client.
+  void SetPingbackReportingFraction(float pingback_reporting_fraction);
+
   // Accessor methods.
   DataReductionProxyCompressionStats* compression_stats() const {
     return compression_stats_.get();
   }
 
   DataReductionProxyEventStore* event_store() const {
     return event_store_.get();
   }
 
   net::URLRequestContextGetter* url_request_context_getter() const {