Embed a single sample in histogram metadata.

base/metrics/histogram_unittest.cc

Index: base/metrics/histogram_unittest.cc
diff --git a/base/metrics/histogram_unittest.cc b/base/metrics/histogram_unittest.cc
index 02ed93ba0e25b177ddfdd0601655b6ec57d30b19..d89e7e93247d8b60896aa46b6bd4fa3dafe03b39 100644
--- a/base/metrics/histogram_unittest.cc
+++ b/base/metrics/histogram_unittest.cc
@@ -490,15 +490,15 @@ TEST_P(HistogramTest, CorruptSampleCounts) {
   EXPECT_EQ(2, snapshot->redundant_count());
   EXPECT_EQ(2, snapshot->TotalCount());
 
-  snapshot->counts_[3] += 100;  // Sample count won't match redundant count.
+  snapshot->counts()[3] += 100;  // Sample count won't match redundant count.
   EXPECT_EQ(HistogramBase::COUNT_LOW_ERROR,
             histogram->FindCorruption(*snapshot));
-  snapshot->counts_[2] -= 200;
+  snapshot->counts()[2] -= 200;
   EXPECT_EQ(HistogramBase::COUNT_HIGH_ERROR,
             histogram->FindCorruption(*snapshot));
 
   // But we can't spot a corruption if it is compensated for.
-  snapshot->counts_[1] += 100;
+  snapshot->counts()[1] += 100;
   EXPECT_EQ(HistogramBase::NO_INCONSISTENCIES,
             histogram->FindCorruption(*snapshot));
 }