Add UMA.IsClonedInstall boolean histogram.

components/metrics/metrics_log.cc

 // 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.
 
 #include "components/metrics/metrics_log.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 279 matching lines @@
   if (version_mismatch_count) {
     local_state_->SetInteger(prefs::kStabilityVersionMismatchCount, 0);
     UMA_STABILITY_HISTOGRAM_COUNTS_100(
         "Stability.Internals.VersionMismatchCount",
         version_mismatch_count);
   }
 }
 
 void MetricsLog::RecordGeneralMetrics(
     const std::vector<MetricsProvider*>& metrics_providers) {
+  if (local_state_->GetBoolean(prefs::kMetricsResetIds))
+    UMA_HISTOGRAM_BOOLEAN("UMA.IsClonedInstall", true);
+
   for (size_t i = 0; i < metrics_providers.size(); ++i)
     metrics_providers[i]->ProvideGeneralMetrics(uma_proto());
 }
 
 void MetricsLog::GetFieldTrialIds(
     std::vector<ActiveGroupId>* field_trial_ids) const {
   variations::GetFieldTrialActiveGroupIds(field_trial_ids);
 }
 
 bool MetricsLog::HasEnvironment() const {
@@ skipping 147 matching lines @@
   DCHECK(!closed_);
   closed_ = true;
 }
 
 void MetricsLog::GetEncodedLog(std::string* encoded_log) {
   DCHECK(closed_);
   uma_proto_.SerializeToString(encoded_log);
 }
 
 }  // namespace metrics