Revert 197147 "Deeper histogram for SQLITE_IOERR."

trunk/src/sql/connection.cc

Index: trunk/src/sql/connection.cc
===================================================================
--- trunk/src/sql/connection.cc	(revision 197194)
+++ trunk/src/sql/connection.cc	(working copy)
@@ -714,15 +714,6 @@
 
   static size_t kSqliteErrorMax = 50;
   UMA_HISTOGRAM_ENUMERATION("Sqlite.Error", base_err, kSqliteErrorMax);
-  if (base_err == SQLITE_IOERR) {
-    // TODO(shess): Consider folding the IOERR range into the main
-    // histogram directly.  Perhaps 30..49?  The downside risk would
-    // be that SQLite core adds a bunch of codes and this becomes a
-    // complicated mapping.
-    static size_t kSqliteIOErrorMax = 20;
-    UMA_HISTOGRAM_ENUMERATION("Sqlite.Error.IOERR", err>>8, kSqliteIOErrorMax);
-  }
-
   if (!error_histogram_name_.empty()) {
     // TODO(shess): The histogram macros create a bit of static
     // storage for caching the histogram object.  Since SQLite is