diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 274d9b3bfbf8..891a274b1f8f 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -115081,7 +115081,13 @@ from previous Chrome versions.
   <suffix name="Autofill"/>
   <suffix name="Policy"/>
   <suffix name="SpellChecker"/>
-  <suffix name="NTPSnippets"/>
+  <suffix name="NTPSnippets">
+    <obsolete>
+      Deprecated March 2017
+    </obsolete>
+  </suffix>
+  <suffix name="NTPSnippetsSuggestions"/>
+  <suffix name="NTPSnippetsThumbnails"/>
   <affected-histogram name="DataUse.MessageSize"/>
 </histogram_suffixes>