Remove num_events_ member from MetricsLogBase.

components/metrics/metrics_log_base.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_base.h"
 
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_samples.h"
 #include "components/metrics/metrics_hashes.h"
 #include "components/metrics/proto/histogram_event.pb.h"
@@ skipping 17 matching lines @@
 bool IsTestingID(const std::string& id) {
   return id.size() < 16;
 }
 
 }  // namespace
 
 MetricsLogBase::MetricsLogBase(const std::string& client_id,
                                int session_id,
                                LogType log_type,
                                const std::string& version_string)
-    : num_events_(0),
-      locked_(false),
+    : locked_(false),
       log_type_(log_type) {
   DCHECK_NE(NO_LOG, log_type);
   if (IsTestingID(client_id))
     uma_proto_.set_client_id(0);
   else
     uma_proto_.set_client_id(Hash(client_id));
 
   uma_proto_.set_session_id(session_id);
   uma_proto_.mutable_system_profile()->set_build_timestamp(GetBuildTime());
   uma_proto_.mutable_system_profile()->set_app_version(version_string);
@@ skipping 43 matching lines @@
   DCHECK(locked_);
   uma_proto_.SerializeToString(encoded_log);
 }
 
 void MetricsLogBase::RecordUserAction(const std::string& key) {
   DCHECK(!locked_);
 
   UserActionEventProto* user_action = uma_proto_.add_user_action_event();
   user_action->set_name_hash(Hash(key));
   user_action->set_time(GetCurrentTime());
-
-  ++num_events_;
 }
 
 void MetricsLogBase::RecordHistogramDelta(const std::string& histogram_name,
                                           const HistogramSamples& snapshot) {
   DCHECK(!locked_);
   DCHECK_NE(0, snapshot.TotalCount());
 
   // We will ignore the MAX_INT/infinite value in the last element of range[].
 
   HistogramEventProto* histogram_proto = uma_proto_.add_histogram_event();
@@ skipping 18 matching lines @@
     if (i + 1 < histogram_proto->bucket_size() &&
         bucket->max() == histogram_proto->bucket(i + 1).min()) {
       bucket->clear_max();
     } else if (bucket->max() == bucket->min() + 1) {
       bucket->clear_min();
     }
   }
 }
 
 }  // namespace metrics