perfetto: switch base::Optional to std::optional

Now that base::Optional is simply a shim for std::optional and it's
stuck without being reverted, migrate everything over to use
std::optional directly.

Change-Id: Ic2595fc1cfae8f3b62350f8bf206675c709894a1

src/trace_processor/sqlite/sqlite_table.h

diff --git a/src/trace_processor/sqlite/sqlite_table.h b/src/trace_processor/sqlite/sqlite_table.h
index 2d9ed50..de94669 100644
--- a/src/trace_processor/sqlite/sqlite_table.h
+++ b/src/trace_processor/sqlite/sqlite_table.h
@@ -22,11 +22,11 @@
 #include <functional>
 #include <limits>
 #include <memory>
+#include <optional>
 #include <string>
 #include <vector>
 
 #include "perfetto/base/status.h"
-#include "perfetto/ext/base/optional.h"
 #include "perfetto/ext/base/utils.h"
 #include "perfetto/trace_processor/basic_types.h"
 #include "src/trace_processor/sqlite/query_constraints.h"