Add basic sqlite error handling to the new sqlite handlers...

app/sql/connection.cc

Index: app/sql/connection.cc
===================================================================
--- app/sql/connection.cc	(revision 27122)
+++ app/sql/connection.cc	(working copy)
@@ -313,4 +313,12 @@
     (*i)->Close();
 }
 
+int Connection::OnSqliteError(int err, sql::Statement *stmt) {
+  if (error_delegate_.get())
+    return error_delegate_->OnError(err, this, stmt);
+  // The default handling is to assert on debug and to ignore on release.
+  NOTREACHED() << GetErrorMessage();
+  return err;
+}
+
 }  // namespace sql