Connect SparseHistogram with the rest of stats system

chrome/browser/extensions/api/metrics_private/metrics_apitest.cc

 // 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.
 
 #include <map>
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "content/public/browser/user_metrics.h"
@@ skipping 92 matching lines @@
   base::StatisticsRecorder::GetHistograms(&histograms);
 
   // Code other than the tests tun here will record some histogram values, but
   // we will ignore those. This function validates that all the histogram we
   // expect to see are present in the list, and that their basic info is
   // correct.
   for (int i = 0; i < count; ++i) {
     const RecordedHistogram& r = recorded[i];
     size_t j = 0;
     for (j = 0; j < histograms.size(); ++j) {
-      base::Histogram* histogram(histograms[j]);
+      base::HistogramBase* histogram(histograms[j]);
 
       if (r.name == histogram->histogram_name()) {
         EXPECT_EQ(r.type, histogram->GetHistogramType());
-        EXPECT_EQ(r.min, histogram->declared_min());
-        EXPECT_EQ(r.max, histogram->declared_max());
-        EXPECT_EQ(r.buckets, histogram->bucket_count());
+        EXPECT_TRUE(
+            histogram->HasConstructionArguments(r.min, r.max, r.buckets));
         break;
       }
     }
     EXPECT_LT(j, histograms.size());
   }
 }
 
 }  // anonymous namespace
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Metrics) {
   UserActionObserver observer;
 
   ASSERT_TRUE(RunComponentExtensionTest("metrics")) << message_;
 
   observer.ValidateUserActions(g_user_actions, arraysize(g_user_actions));
   ValidateHistograms(g_histograms, arraysize(g_histograms));
 }