Remove NPAPI support from Chrome Frame.

chrome_frame/chrome_frame_histograms.cc

-// Copyright (c) 2010 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.
-
-#include "chrome_frame/chrome_frame_histograms.h"
-
-#include "base/metrics/histogram.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/message_loop.h"
-
-using base::Histogram;
-using base::StatisticsRecorder;
-
-  // Initialize histogram statistics gathering system.
-base::LazyInstance<StatisticsRecorder>
-    g_statistics_recorder_(base::LINKER_INITIALIZED);
-
-ChromeFrameHistogramSnapshots::ChromeFrameHistogramSnapshots() {
-  // Ensure that an instance of the StatisticsRecorder object is created.
-  g_statistics_recorder_.Get();
-}
-
-ChromeFrameHistogramSnapshots::HistogramPickledList
-  ChromeFrameHistogramSnapshots::GatherAllHistograms() {
-
-  base::AutoLock auto_lock(lock_);
-
-  StatisticsRecorder::Histograms histograms;
-  StatisticsRecorder::GetHistograms(&histograms);
-
-  HistogramPickledList pickled_histograms;
-
-  for (StatisticsRecorder::Histograms::iterator it = histograms.begin();
-       histograms.end() != it;
-       it++) {
-    (*it)->SetFlags(Histogram::kIPCSerializationSourceFlag);
-    GatherHistogram(**it, &pickled_histograms);
-  }
-
-  return pickled_histograms;
-}
-
-void ChromeFrameHistogramSnapshots::GatherHistogram(
-    const Histogram& histogram,
-    HistogramPickledList* pickled_histograms) {
-
-  // Get up-to-date snapshot of sample stats.
-  Histogram::SampleSet snapshot;
-  histogram.SnapshotSample(&snapshot);
-  const std::string& histogram_name = histogram.histogram_name();
-
-  // Check if we already have a log of this histogram and if not create an
-  // empty set.
-  LoggedSampleMap::iterator it = logged_samples_.find(histogram_name);
-  Histogram::SampleSet* already_logged;
-  if (logged_samples_.end() == it) {
-    // Add new entry.
-    already_logged = &logged_samples_[histogram.histogram_name()];
-    already_logged->Resize(histogram);  // Complete initialization.
-  } else {
-    already_logged = &(it->second);
-    // Deduct any stats we've already logged from our snapshot.
-    snapshot.Subtract(*already_logged);
-  }
-
-  // Snapshot now contains only a delta to what we've already_logged.
-  if (snapshot.TotalCount() > 0) {
-    GatherHistogramDelta(histogram, snapshot, pickled_histograms);
-    // Add new data into our running total.
-    already_logged->Add(snapshot);
-  }
-}
-
-void ChromeFrameHistogramSnapshots::GatherHistogramDelta(
-    const Histogram& histogram,
-    const Histogram::SampleSet& snapshot,
-    HistogramPickledList* pickled_histograms) {
-
-  DCHECK(0 != snapshot.TotalCount());
-  snapshot.CheckSize(histogram);
-
-  std::string histogram_info =
-      Histogram::SerializeHistogramInfo(histogram, snapshot);
-  pickled_histograms->push_back(histogram_info);
-}