[sql] Cleanup open and close error histograms.

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 897e120c7e2a02280e3cfc8d599edff57e305ea5..dc547d75aaddab82490d14ab18b35d05452143dc 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -13014,6 +13014,10 @@ other types of suffix sets.
   <summary>Error codes returned by sqlite for the appcache db.</summary>
 </histogram>
 
+<histogram name="Sqlite.CloseFailure" enum="SqliteErrorCode">
+  <summary>Error which prevented database close.</summary>
+</histogram>
+
 <histogram name="Sqlite.Cookie.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite the cookie db.</summary>
 </histogram>
@@ -13047,6 +13051,14 @@ other types of suffix sets.
   <summary>Error codes returned by sqlite for the history db.</summary>
 </histogram>
 
+<histogram name="Sqlite.OpenFailure" enum="SqliteErrorCode">
+  <summary>Error which prevented database open.</summary>
+</histogram>
+
+<histogram name="Sqlite.OpenProbeFailure" enum="SqliteErrorCode">
+  <summary>Error from first read of the database.</summary>
+</histogram>
+
 <histogram name="Sqlite.Quota.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite for the quota db.</summary>
 </histogram>