Add comments to HistogramFlatterner interface and rename a function

chrome/common/metrics/metrics_service_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 "chrome/common/metrics/metrics_service_base.h"
 
 #include <cstdlib>
 
 #include "chrome/common/metrics/metrics_log_base.h"
 
@@ skipping 23 matching lines @@
   DCHECK(log_manager_.current_log());
   histogram_snapshot_manager_.PrepareDeltas(base::Histogram::kNoFlags, true);
 }
 
 void MetricsServiceBase::RecordDelta(
     const base::Histogram& histogram,
     const base::Histogram::SampleSet& snapshot) {
   log_manager_.current_log()->RecordHistogramDelta(histogram, snapshot);
 }
 
-void MetricsServiceBase::InconsistencyDetected(int problem) {
+void MetricsServiceBase::InconsistencyDetected(
+    Histogram::Inconsistencies problem) {
   UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesBrowser",
                             problem, Histogram::NEVER_EXCEEDED_VALUE);
 }
 
-void MetricsServiceBase::UniqueInconsistencyDetected(int problem) {
+void MetricsServiceBase::UniqueInconsistencyDetected(
+    Histogram::Inconsistencies problem) {
   UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesBrowserUnique",
                             problem, Histogram::NEVER_EXCEEDED_VALUE);
 }
 
-void MetricsServiceBase::SnapshotProblemResolved(int amount) {
+void MetricsServiceBase::InconsistencyDetectedInLoggedCount(int amount) {
   UMA_HISTOGRAM_COUNTS("Histogram.InconsistentSnapshotBrowser",
                        std::abs(amount));
 }