Move EntropyProvider Source From MetricsService to MetricsServicesManager

components/metrics_services_manager/metrics_services_manager_client.h

 // Copyright 2015 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_METRICS_SERVICES_MANAGER_METRICS_SERVICES_MANAGER_CLIENT_H_
 #define COMPONENTS_METRICS_SERVICES_MANAGER_METRICS_SERVICES_MANAGER_CLIENT_H_
 
 #include <memory>
 
 #include "base/callback_forward.h"
+#include "base/metrics/field_trial.h"
 
 namespace metrics {
 class MetricsServiceClient;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace rappor {
@@ skipping 11 matching lines @@
 class MetricsServicesManagerClient {
  public:
   virtual ~MetricsServicesManagerClient() {}
 
   // Methods that create the various services in the context of the embedder.
   virtual std::unique_ptr<rappor::RapporService> CreateRapporService() = 0;
   virtual std::unique_ptr<variations::VariationsService>
   CreateVariationsService() = 0;
   virtual std::unique_ptr<metrics::MetricsServiceClient>
   CreateMetricsServiceClient() = 0;
+  virtual std::unique_ptr<const base::FieldTrial::EntropyProvider>
+  CreateEntropyProvider() = 0;
 
   // Returns the URL request context in which the metrics services should
   // operate.
   virtual net::URLRequestContextGetter* GetURLRequestContext() = 0;
 
   // Returns whether safe browsing is enabled. If relevant in the embedder's
   // context, |on_update_callback| will be set up to be called when the state of
   // safe browsing changes. |on_update_callback| is guaranteed to be valid for
   // the lifetime of this client instance, but should not be used beyond this
   // instance being destroyed.
   virtual bool IsSafeBrowsingEnabled(
       const base::Closure& on_update_callback) = 0;
 
   // Returns whether metrics reporting is enabled.
   virtual bool IsMetricsReportingEnabled() = 0;
 
   // Whether the metrics services should record but not report metrics.
   virtual bool OnlyDoMetricsRecording() = 0;
 
   // Update the running state of metrics services managed by the embedder, for
   // example, crash reporting.
   virtual void UpdateRunningServices(bool may_record, bool may_upload) {}
 };
 
 }  // namespace metrics_services_manager
 
 #endif  // COMPONENTS_METRICS_SERVICES_MANAGER_METRICS_SERVICES_MANAGER_CLIENT_H_