Devirtualize SerializedScriptValue's destructor

Devirtualize SerializedScriptValue's destructor to avoid creating an
unnecessary vtable. SerializedScriptValue is never subclassed nor
does it have any virtual function.

BUG=

Review URL: https://codereview.chromium.org/40733002

git-svn-id: svn://svn.chromium.org/blink/trunk@160477 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Convert make_settings.pl to Python

BUG=309901
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/33023006

git-svn-id: svn://svn.chromium.org/blink/trunk@160478 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Devirtualize ScriptHeapSnapshot's destructor

Devirtualize ScriptHeapSnapshot's destructor to avoid creating an unnecessary
vtable. ScriptHeapSnapshot is never subclassed nor does it have any virtual
function.

BUG=

Review URL: https://codereview.chromium.org/40773002

git-svn-id: svn://svn.chromium.org/blink/trunk@160479 bbb929c8-8fbe-4397-9dbb-9b2b20218538