Connect SparseHistogram with the rest of stats system

base/metrics/histogram_base.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 "base/metrics/histogram_base.h"
 
 #include <climits>
 
 #include "base/logging.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 82 matching lines @@
 void HistogramBase::AddBoolean(bool value) {
   Add(value ? 1 : 0);
 }
 
 bool HistogramBase::SerializeInfo(Pickle* pickle) const {
   if (!pickle->WriteInt(GetHistogramType()))
     return false;
   return SerializeInfoImpl(pickle);
 }
 
+int HistogramBase::FindCorruption(const HistogramSamples& samples) const {
+  // Not supported by default.
+  return NO_INCONSISTENCIES;
+}
+
 void HistogramBase::WriteJSON(std::string* output) const {
   Count count;
   scoped_ptr<ListValue> buckets(new ListValue());
   GetCountAndBucketData(&count, buckets.get());
   scoped_ptr<DictionaryValue> parameters(new DictionaryValue());
   GetParameters(parameters.get());
 
   JSONStringValueSerializer serializer(output);
   DictionaryValue root;
   root.SetString("name", histogram_name());
   root.SetInteger("count", count);
   root.SetInteger("flags", flags());
   root.Set("params", parameters.release());
   root.Set("buckets", buckets.release());
   serializer.Serialize(root);
 }
 
 }  // namespace base