Resetting metrics ids on clump detection.

chrome/browser/metrics/metrics_service.h

 // Copyright (c) 2012 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.
 
 // This file defines a service that collects information about the user
 // experience in order to help improve future versions of the app.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 
@@ skipping 275 matching lines @@
   // is registered for a given trial name will be recorded. The values passed
   // in must not correspond to any real field trial in the code.
   // To use this method, SyntheticTrialGroup should friend your class.
   void RegisterSyntheticFieldTrial(const SyntheticTrialGroup& trial_group);
 
   // Check if this install was cloned or imaged from another machine. If a
   // clone is detected, reset the client id and low entropy source. This
   // should not be called more than once.
   void CheckForClonedInstall();
 
+  void ResetVariationsState();
+
  private:
   // The MetricsService has a lifecycle that is stored as a state.
   // See metrics_service.cc for description of this lifecycle.
   enum State {
     INITIALIZED,                    // Constructor was called.
     INIT_TASK_SCHEDULED,            // Waiting for deferred init tasks to
                                     // complete.
     INIT_TASK_DONE,                 // Waiting for timer to send initial log.
     SENDING_INITIAL_STABILITY_LOG,  // Initial stability log being sent.
     SENDING_INITIAL_METRICS_LOG,    // Initial metrics log being sent.
@@ skipping 362 matching lines @@
 
   // Returns true if crash reporting is enabled.  This is set at the platform
   // level for Android and ChromeOS, and otherwise is the same as
   // IsMetricsReportingEnabled for desktop Chrome.
   static bool IsCrashReportingEnabled();
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(MetricsServiceHelper);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_SERVICE_H_