platform2: Enforce virtual destructors on base classes
There have been a number of memory leak issues due to absence of
virtual destructors on base classes. Swept through the following targets:
buffet, libchromeos, webserver.
For every class defined, I did one of the following three things:
1. If the class is not meant to be derived from, marked it as 'final'.
2. If classes derived from a particular base class are not meant to be
deleted through the base class, marked the base class's destructor
as 'protected'.
3. Otherwise made the base class's destructor virtual.
BUG=None
TEST=`FEATURES=test emerge-link libchromeos webserver buffet`
Change-Id: I4d909399896d025c39980c9546b79b145614fc47
Reviewed-on: https://chromium-review.googlesource.com/273000
Trybot-Ready: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
diff --git a/buffet/commands/command_definition.h b/buffet/commands/command_definition.h
index 3328a94..a5e2916 100644
--- a/buffet/commands/command_definition.h
+++ b/buffet/commands/command_definition.h
@@ -19,7 +19,7 @@
// constraints. See comments for CommandDefinitions::LoadCommands for the
// detailed description of what command categories are and what they are used
// for.
-class CommandDefinition {
+class CommandDefinition final {
public:
struct Visibility {
Visibility() = default;