Histograms - Support histograms for Plugins, GPU

chrome/common/metrics/metrics_service_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.
 
 #ifndef CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_
 #define CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/metrics/histogram.h"
-#include "chrome/common/metrics/histogram_sender.h"
+#include "base/metrics/histogram_flattener.h"
+#include "base/metrics/histogram_snapshot_manager.h"
 #include "chrome/common/metrics/metrics_log_manager.h"
 
 // This class provides base functionality for logging metrics data.
 // TODO(ananta): Factor out more common code from chrome and chrome frame
 // metrics service into this class.
-class MetricsServiceBase : public HistogramSender {
+class MetricsServiceBase : public base::HistogramFlattener {
+ public:
+  // HistogramFlattener interface (override) methods.
+  virtual void RecordDelta(const base::Histogram& histogram,
+                           const base::Histogram::SampleSet& snapshot) OVERRIDE;
+  virtual void InconsistencyDetected(int problem) OVERRIDE;
+  virtual void UniqueInconsistencyDetected(int problem) OVERRIDE;
+  virtual void SnapshotProblemResolved(int amount) OVERRIDE;
+
  protected:
   MetricsServiceBase();
   virtual ~MetricsServiceBase();
 
   // The metrics servers' URLs, for XML and protobuf uploads.
   static const char kServerUrlXml[];
   static const char kServerUrlProto[];
 
   // The MIME types for the uploaded metrics data, for XML and protobuf uploads.
   static const char kMimeTypeXml[];
   static const char kMimeTypeProto[];
 
   // Record complete list of histograms into the current log.
   // Called when we close a log.
   void RecordCurrentHistograms();
 
   // Manager for the various in-flight logs.
   MetricsLogManager log_manager_;
 
  private:
-  // HistogramSender interface (override) methods.
-  virtual void TransmitHistogramDelta(
-      const base::Histogram& histogram,
-      const base::Histogram::SampleSet& snapshot) OVERRIDE;
-  virtual void InconsistencyDetected(int problem) OVERRIDE;
-  virtual void UniqueInconsistencyDetected(int problem) OVERRIDE;
-  virtual void SnapshotProblemResolved(int amount) OVERRIDE;
+  // |histogram_snapshot_manager_| prepares histogram deltas for transmission.
+  base::HistogramSnapshotManager histogram_snapshot_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsServiceBase);
 };
 
 #endif  // CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_