Adding a DataSaverStatus interface to DataReductionProxy

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
index 7173f526ed2d5dbe2a0af080c387629363e99afc..4f6a7160f445e6949998a4ae068bae428ca0c7a6 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
@@ -11,20 +11,21 @@
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_service_observer.h"
+#include "components/data_reduction_proxy/core/common/data_saver_status.h"
 #include "components/prefs/pref_member.h"
 #include "url/gurl.h"
 
 class PrefService;
 
 namespace data_reduction_proxy {
 
 class DataReductionProxyConfig;
 class DataReductionProxyEventStore;
 class DataReductionProxyIOData;
@@ -62,28 +63,32 @@ enum LoFiImplicitOptOutAction {
 // in metrics/histograms/histograms.xml.
 enum DataReductionSettingsEnabledAction {
   DATA_REDUCTION_SETTINGS_ACTION_OFF_TO_ON = 0,
   DATA_REDUCTION_SETTINGS_ACTION_ON_TO_OFF,
   DATA_REDUCTION_SETTINGS_ACTION_BOUNDARY,
 };
 
 // Central point for configuring the data reduction proxy.
 // This object lives on the UI thread and all of its methods are expected to
 // be called from there.
-class DataReductionProxySettings : public DataReductionProxyServiceObserver {
+class DataReductionProxySettings : public DataReductionProxyServiceObserver,
+                                   public DataSaverStatus {
  public:
   typedef base::Callback<bool(const std::string&, const std::string&)>
       SyntheticFieldTrialRegistrationCallback;
 
   DataReductionProxySettings();
   virtual ~DataReductionProxySettings();
 
+  // DataSaverStatus implementation:
+  bool IsDataSaverEnabled() const override;
+
   // Initializes the Data Reduction Proxy with the name of the preference that
   // controls enabling it, profile prefs and a |DataReductionProxyIOData|. The
   // caller must ensure that all parameters remain alive for the lifetime of
   // the |DataReductionProxySettings| instance.
   void InitDataReductionProxySettings(
       const std::string& data_reduction_proxy_enabled_pref_name,
       PrefService* prefs,
       DataReductionProxyIOData* io_data,
       std::unique_ptr<DataReductionProxyService> data_reduction_proxy_service);