Remove NPAPI support from Chrome Frame.

chrome_frame/chrome_frame_histograms.h

-// Copyright (c) 2011 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_FRAME_HISTOGRAM_SNAPSHOTS_H_
-#define CHROME_FRAME_HISTOGRAM_SNAPSHOTS_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/metrics/histogram.h"
-#include "base/process.h"
-#include "base/synchronization/lock.h"
-#include "base/task.h"
-
-// This class gathers histogram data in the host browser process and
-// serializes the data into a vector of strings to be uploaded to the
-// Chrome browser process. It records the histogram data which has been
-// logged and only uploads the delta with the next log.
-// TODO(iyengar)
-// This class does not contain any ChromeFrame specific stuff. It should
-// be moved to base.
-class ChromeFrameHistogramSnapshots {
- public:
-  // 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;
-
-  ChromeFrameHistogramSnapshots();
-  ~ChromeFrameHistogramSnapshots() {}
-
-  // Extract snapshot data and return it to be sent off to the Chrome browser
-  // process.
-  // Return only a delta to what we have already sent.
-  HistogramPickledList GatherAllHistograms();
-
- private:
-  void GatherHistogram(const base::Histogram& histogram,
-                       HistogramPickledList* histograms);
-
-  void GatherHistogramDelta(const base::Histogram& histogram,
-                            const base::Histogram::SampleSet& snapshot,
-                            HistogramPickledList* histograms);
-
-  // For histograms, record what we've already logged (as a sample for each
-  // histogram) so that we can send only the delta with the next log.
-  LoggedSampleMap logged_samples_;
-
-  // Synchronizes the histogram gathering operation.
-  base::Lock lock_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeFrameHistogramSnapshots);
-};
-
-#endif  // CHROME_RENDERER_HISTOGRAM_SNAPSHOTS_H_