Remove NO_LOG LogType enum value.

components/metrics/metrics_log_base.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.
 
 // This file defines a set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
 #ifndef COMPONENTS_METRICS_METRICS_LOG_BASE_H_
 #define COMPONENTS_METRICS_METRICS_LOG_BASE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
 
 namespace base {
 class HistogramSamples;
 }  // namespace base
 
 namespace metrics {
 
 // This class provides base functionality for logging metrics data.
 class MetricsLogBase {
  public:
-  // TODO(asvitkine): Remove the NO_LOG value.
   enum LogType {
     INITIAL_STABILITY_LOG,  // The initial log containing stability stats.
     ONGOING_LOG,            // Subsequent logs in a session.
-    NO_LOG,                 // Placeholder value for when there is no log.
   };
 
   // Creates a new metrics log of the specified type.
   // client_id is the identifier for this profile on this installation
   // session_id is an integer that's incremented on each application launch
   MetricsLogBase(const std::string& client_id,
                  int session_id,
                  LogType log_type,
                  const std::string& version_string);
   virtual ~MetricsLogBase();
@@ skipping 54 matching lines @@
 
   // Stores the protocol buffer representation for this log.
   metrics::ChromeUserMetricsExtension uma_proto_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLogBase);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_LOG_BASE_H_