Introduce MetricsServiceClient::StartGatheringMetrics

components/metrics/test_metrics_service_client.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_METRICS_TEST_METRICS_SERVICE_CLIENT_H_
 #define COMPONENTS_METRICS_TEST_METRICS_SERVICE_CLIENT_H_
 
 #include <string>
 
 #include "components/metrics/metrics_service_client.h"
@@ skipping 10 matching lines @@
   virtual ~TestMetricsServiceClient();
 
   // MetricsServiceClient:
   virtual void SetClientID(const std::string& client_id) OVERRIDE;
   virtual bool IsOffTheRecordSessionActive() OVERRIDE;
   virtual std::string GetApplicationLocale() OVERRIDE;
   virtual bool GetBrand(std::string* brand_code) OVERRIDE;
   virtual SystemProfileProto::Channel GetChannel() OVERRIDE;
   virtual std::string GetVersionString() OVERRIDE;
   virtual void OnLogUploadComplete() OVERRIDE;
+  virtual void StartGatheringMetrics(
+      const base::Closure& done_callback) OVERRIDE;
   virtual void CollectFinalMetrics(const base::Closure& done_callback)
       OVERRIDE;
 
   const std::string& get_client_id() const { return client_id_; }
 
  private:
   std::string client_id_;
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_TEST_METRICS_SERVICE_CLIENT_H_