Expose macros from base/metrics/histogram_macros.h as functions

base/test/histogram_tester.cc

Index: base/test/histogram_tester.cc
diff --git a/base/test/histogram_tester.cc b/base/test/histogram_tester.cc
index 65c4285c210646ccfcdf8eaea5ba4eea8071c09a..eb8d2fe03cb6270788ad9d9ed24699f70199300c 100644
--- a/base/test/histogram_tester.cc
+++ b/base/test/histogram_tester.cc
@@ -78,6 +78,12 @@ void HistogramTester::ExpectTotalCount(const std::string& name,
   }
 }
 
+void HistogramTester::ExpectTimeBucketCount(
+    const std::string& name, base::TimeDelta sample,
+    base::HistogramBase::Count count) const {
+  ExpectBucketCount(name, sample.InMilliseconds(), count);
+}
+
 std::vector<Bucket> HistogramTester::GetAllSamples(
     const std::string& name) const {
   std::vector<Bucket> samples;