(search-highlight, isearch, isearch-lazy-highlight):

(search-highlight, isearch, isearch-lazy-highlight):
Bring together isearch highlight related options.
(lazy-highlight): Replace group `replace' by `matching'.
(lazy-highlight-cleanup, lazy-highlight-initial-delay)
(lazy-highlight-interval, lazy-highlight-max-at-a-time)
(lazy-highlight): Add aliases to old names isearch-lazy-highlight-...
and declare them obsolete.
(lazy-highlight-face): Rename from isearch-lazy-highlight-face.
(isearch-faces): Remove defgroup.
(isearch-overlay, isearch-highlight, isearch-dehighlight):
Move isearch highlighting code closer to lazy highlighting code.