Implement sql::Connection::RazeAndClose().

sql/statement.cc

Index: sql/statement.cc
diff --git a/sql/statement.cc b/sql/statement.cc
index cd55bf710ff94ca4d3ea1def37f3ebed41815a3a..6e5cf3e0f2bbe70dbb7f02c97a8a881ba6fa532f 100644
--- a/sql/statement.cc
+++ b/sql/statement.cc
@@ -42,8 +42,10 @@ void Statement::Clear() {
 }
 
 bool Statement::CheckValid() const {
-  if (!is_valid())
-    DLOG(FATAL) << "Cannot call mutating statements on an invalid statement.";
+  // Allow operations to fail silently if a statement was invalidated
+  // because the database was closed by an error handler.
+  DLOG_IF(FATAL, !ref_->was_valid())
+      << "Cannot call mutating statements on an invalid statement.";
   return is_valid();
 }
 
@@ -306,7 +308,7 @@ bool Statement::CheckOk(int err) const {
 int Statement::CheckError(int err) {
   // Please don't add DCHECKs here, OnSqliteError() already has them.
   succeeded_ = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE);
-  if (!succeeded_ && is_valid() && ref_->connection())
+  if (!succeeded_ && ref_ && ref_->connection())
     return ref_->connection()->OnSqliteError(err, this);
   return err;
 }