Create variations param for RapporRollout to non-UMA users.

components/rappor/rappor_service.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_RAPPOR_RAPPOR_SERVICE_H_
 #define COMPONENTS_RAPPOR_RAPPOR_SERVICE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 24 matching lines @@
 };
 
 // This class provides an interface for recording samples for rappor metrics,
 // and periodically generates and uploads reports based on the collected data.
 class RapporService {
  public:
   RapporService();
   virtual ~RapporService();
 
   // Starts the periodic generation of reports and upload attempts.
-  void Start(PrefService* pref_service, net::URLRequestContextGetter* context);
+  void Start(PrefService* pref_service,
+             net::URLRequestContextGetter* context,
+             bool metrics_enabled);
 
   // Records a sample of the rappor metric specified by |metric_name|.
   // Creates and initializes the metric, if it doesn't yet exist.
   void RecordSample(const std::string& metric_name,
                     RapporType type,
                     const std::string& sample);
 
   // Sets the cohort value.  For use by tests only.
   void SetCohortForTesting(uint32_t cohort) { cohort_ = cohort; }
 
@@ skipping 54 matching lines @@
   // We keep all registered metrics in a map, from name to metric.
   // The map owns the metrics it contains.
   std::map<std::string, RapporMetric*> metrics_map_;
 
   DISALLOW_COPY_AND_ASSIGN(RapporService);
 };
 
 }  // namespace rappor
 
 #endif  // COMPONENTS_RAPPOR_RAPPOR_SERVICE_H_