Move part of metrics from chrome/common to components

components/metrics/metrics_log_base.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 set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
-#ifndef CHROME_COMMON_METRICS_METRICS_LOG_BASE_H_
-#define CHROME_COMMON_METRICS_METRICS_LOG_BASE_H_
+#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 "chrome/common/metrics/proto/chrome_user_metrics_extension.pb.h"
-#include "content/public/common/page_transition_types.h"
-
-class GURL;
+#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
 
 namespace base {
 class HistogramSamples;
 }  // namespace base
 
+namespace metrics {

[Ilya Sherman, 2014/04/15 23:00:40]

nit: There should be a blank line after this one.  It's only omitted for
forward-declarations.

 // 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.
   };
 
@@ skipping 63 matching lines @@
   bool locked_;
 
   // The type of the log, i.e. initial or ongoing.
   const LogType log_type_;
 
   // Stores the protocol buffer representation for this log.
   metrics::ChromeUserMetricsExtension uma_proto_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLogBase);
 };
+}  // namespace metrics

[Ilya Sherman, 2014/04/15 23:00:40]

nit: And, correspondingly, a blank line before this one.

 
-#endif  // CHROME_COMMON_METRICS_METRICS_LOG_BASE_H_
+#endif  // COMPONENTS_METRICS_METRICS_LOG_BASE_H_