Introduce MetricsServiceClient::StartGatheringMetrics

chrome/browser/metrics/chrome_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 CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_
 #define CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 16 matching lines @@
   virtual ~ChromeMetricsServiceClient();
 
   // metrics::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 metrics::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;
 
   // Stores a weak pointer to the given |service|.
   // TODO(isherman): Fix the memory ownership model so that this method is not
   // needed: http://crbug.com/375248
   void set_service(MetricsService* service) { service_ = service; }
 
  private:
   // Callbacks for various stages of final log info collection. Do not call
@@ skipping 32 matching lines @@
 
   // Number of async histogram fetch requests in progress.
   int num_async_histogram_fetches_in_progress_;
 
   base::WeakPtrFactory<ChromeMetricsServiceClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMetricsServiceClient);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_