Set file tokens for NaCl main nexe if available to enable validation caching.

chrome/test/base/uma_histogram_helper.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_TEST_BASE_UMA_HISTOGRAM_HELPER_H_
 #define CHROME_TEST_BASE_UMA_HISTOGRAM_HELPER_H_
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_samples.h"
 
 // UMAHistogramHelper provides a simple interface for examining UMA histograms.
 // Tests can use this interface to verify that UMA data is getting logged as
 // intended.
 class UMAHistogramHelper {
  public:
   UMAHistogramHelper();
 
   // Each child process may have its own histogram data, make sure this data
   // gets accumulated into the browser process before we examine the histograms.
   void Fetch();
 
   // We know the exact number of samples in a bucket, and that no other bucket
   // should have samples.
   void ExpectUniqueSample(const std::string& name,
                           base::HistogramBase::Sample sample,
                           base::HistogramBase::Count expected_count);
 
+  // We know the exact number of samples in a bucket, but other buckets may
+  // have samples as well.
+  void ExpectBucketCount(const std::string& name,
+                          base::HistogramBase::Sample sample,
+                          base::HistogramBase::Count expected_count);
+
   // We don't know the values of the samples, but we know how many there are.
   void ExpectTotalCount(const std::string& name,
                         base::HistogramBase::Count count);
 
  private:
   void FetchCallback();
 
   void CheckBucketCount(const std::string& name,
                         base::HistogramBase::Sample sample,
                         base::Histogram::Count expected_count,
                         base::HistogramSamples& samples);
 
   void CheckTotalCount(const std::string& name,
                        base::Histogram::Count expected_count,
                        base::HistogramSamples& samples);
 
   DISALLOW_COPY_AND_ASSIGN(UMAHistogramHelper);
 };
 
 #endif  // CHROME_TEST_BASE_UMA_HISTOGRAM_HELPER_H_