[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 522332c3186c1ace02dc1d9c28afeb1dfd33bef2..6c23d55c2b0c6506c83278a1dade6a72ff4e76a1 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -11838,6 +11838,10 @@ 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>
@@ -11871,6 +11875,14 @@ 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>