[sql] Database recovery system for Shortcuts.

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 4efad5d71eff4c442afd7346449956087716a504..9b1c6f9096f39e4c9e4ea57b0d49f534ba9457de 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -54081,8 +54081,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <owner>shess@chromium.org</owner>
   <summary>
     Records specific failure and success cases in sql::Recovery implementation,
-    to determine which cases (if any) might be worth writing additional
-    automated recovery code for, versus which should lead to clearing databases.
+    to determine which cases warrant further development.  This histogram tracks
+    detected errors, some of which may cause multiple results.  See recovery.cc
+    for details.
   </summary>
 </histogram>
 
@@ -89761,6 +89762,30 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="19" label="RECOVERY_FAILED_META_NO_VERSION">
     GetMetaVersionNumber() found no version row in meta table.
   </int>
+  <int value="20" label="RECOVERY_SUCCESS_AUTORECOVERDB">
+    sql::Recovery::RecoverDatabaseOrRaze() completed successfully.
+  </int>
+  <int value="21" label="RECOVERY_FAILED_AUTORECOVERDB_BEGIN">
+    Autorecover could not setup the database for recovery attempt.
+  </int>
+  <int value="22" label="RECOVERY_FAILED_AUTORECOVERDB_SCHEMASELECT">
+    Autorecover could not read corrupt db schema.
+  </int>
+  <int value="23" label="RECOVERY_FAILED_AUTORECOVERDB_SCHEMACREATE">
+    Autorecover could not create new db schema.
+  </int>
+  <int value="24" label="RECOVERY_FAILED_AUTORECOVERDB_NAMESELECT">
+    Autorecover could not read table names from corrupt db.
+  </int>
+  <int value="25" label="RECOVERY_FAILED_AUTORECOVERDB_TABLE">
+    Autorecover failed when recovering a table.
+  </int>
+  <int value="26" label="RECOVERY_FAILED_AUTORECOVERDB_SEQUENCE">
+    Autorecover failed when recovering sequence table.
+  </int>
+  <int value="27" label="RECOVERY_FAILED_AUTORECOVERDB_AUX">
+    Autorecover failed when recovering triggers, views, or virtual tables.
+  </int>
 </enum>
 
 <enum name="SqliteStatsEnum" type="int">