Make it harder to get ContentSettingsType histogram values wrong

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 6df32d06dc7371157274dd9a4dcebbf2f7768159..f0da2849ffae87c0b8d4c18fbe1c8d99bf45d04b 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -86743,8 +86743,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="22" label="App banner setting (Android only)"/>
   <int value="23" label="Site engagement setting"/>
   <int value="24" label="Durable storage setting"/>
-  <int value="25" label="Key generation setting"/>
-  <int value="26" label="Background sync setting"/>
+  <int value="25" label="Key generation setting [removed]"/>
+  <int value="26" label="Bluetooth guard setting"/>
+  <int value="27" label="Background sync setting"/>
+  <int value="28" label="Autoplay setting"/>
+  <int value="29" label="Important site info setting"/>
+  <int value="30" label="Permission autoblocker data setting"/>
+  <int value="31" label="Subresource filter setting"/>
 </enum>
 
 <enum name="ContentTypeParseableResult" type="int">