Remove recovery diagnostics for the archived history database.

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 2f408397f0c1d001e09aff971b9f9918911e6ad2..9e4a727e96f65e77b4fc84f79801107a1c6c4832 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -3066,10 +3066,13 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="Diagnostics.Recovery.SQLiteIntegrityArchivedHistory"
     enum="DiagnosticsResult">
+  <obsolete>
+    Removed as of Jun 2014: we no longer have an archived database.
+  </obsolete>
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
     Shows the success and failure rates of the SQLiteIntegrityArchivedHistory
-    recovery step that runs on recovery startups.  The recovery step attempts to
+    recovery step that runs on recovery startups. The recovery step attempts to
     guarantee the SQLiteIntegrityArchivedHistory test, which checks the
     integrity of the Archived History database, would pass on the next startup.
   </summary>
@@ -34210,7 +34213,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="10" label="Path User Data Test"/>
   <int value="11" label="Version Test"/>
   <int value="12" label="SQLite Integrity App Cache Test"/>
-  <int value="13" label="SQLite Integrity Archived History Test"/>
+  <int value="13" label="SQLite Integrity Archived History Test (obsolete)"/>
   <int value="14" label="SQLite Integrity Cookie Test"/>
   <int value="15" label="SQLite Integrity Database Tracker Test"/>
   <int value="16" label="SQLite Integrity History Test"/>