Connect SparseHistogram with the rest of stats system

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

Index: chrome/browser/extensions/api/metrics_private/metrics_apitest.cc
diff --git a/chrome/browser/extensions/api/metrics_private/metrics_apitest.cc b/chrome/browser/extensions/api/metrics_private/metrics_apitest.cc
index e9d5efe3d0ae21ffd99473a2196d921999bafb9e..407ddaa88807e54a6fe0b693e57057b0020cc1d6 100644
--- a/chrome/browser/extensions/api/metrics_private/metrics_apitest.cc
+++ b/chrome/browser/extensions/api/metrics_private/metrics_apitest.cc
@@ -110,13 +110,12 @@ void ValidateHistograms(const RecordedHistogram* recorded,
     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;
       }
     }