Histograms - Support histograms for Plugins, GPU

chrome/renderer/renderer_histogram_snapshots.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_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
-#define CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/weak_ptr.h"
-#include "base/metrics/histogram.h"
-#include "base/process.h"
-#include "chrome/common/metrics/histogram_sender.h"
-#include "content/public/renderer/render_process_observer.h"
-
-class RendererHistogramSnapshots : public HistogramSender,
-                                   public content::RenderProcessObserver {
- public:
-  RendererHistogramSnapshots();
-  virtual ~RendererHistogramSnapshots();
-
-  // Send the histogram data.
-  void SendHistograms(int sequence_number);
-
- private:
-  // RenderProcessObserver implementation.
-  virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
-
-  void OnGetRendererHistograms(int sequence_number);
-
-  // Maintain a map of histogram names to the sample stats we've sent.
-  typedef std::map<std::string, base::Histogram::SampleSet> LoggedSampleMap;
-  typedef std::vector<std::string> HistogramPickledList;
-
-  // Extract snapshot data and then send it off the the Browser process.
-  // Send only a delta to what we have already sent.
-  void UploadAllHistrograms(int sequence_number);
-
-  base::WeakPtrFactory<RendererHistogramSnapshots> weak_factory_;
-
-  // 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;
-
-  // Collection of histograms to send to the browser.
-  HistogramPickledList pickled_histograms_;
-
-  DISALLOW_COPY_AND_ASSIGN(RendererHistogramSnapshots);
-};
-
-#endif  // CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_