Revert "CC Mode: Stop Font Lock forcing fontification from BOL. Bug#19669."

This reverts commit d69e9f1c24.

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2015-04-03  Alan Mackenzie  <acm@muc.de>
+
+	* Revert CC Mode change from 2015-01-31 "Handle "#" operater
+	properly inside macro".
+
 2015-04-01  Michael Albinus  <michael.albinus@gmx.de>
 
 	* net/tramp.el (tramp-handle-unhandled-file-name-directory):

lisp/progmodes/cc-mode.el

@@ -1237,14 +1237,6 @@ This function is called from `c-common-init', once per mode initialization."
 	  (font-lock-mark-block-function
 	   . c-mark-function)))
 
-  ;; Prevent `font-lock-default-fontify-region' extending the region it will
-  ;; fontify to whole lines by removing `font-lock-extend-region-whole-lines'
-  ;; (and, coincidentally, `font-lock-extend-region-multiline' (which we do
-  ;; not need)) from `font-lock-extend-region-functions'.  (Emacs only).  This
-  ;; fixes Emacs bug #19669.
-  (when (boundp 'font-lock-extend-region-functions)
-    (setq font-lock-extend-region-functions nil))
-
   (make-local-variable 'font-lock-fontify-region-function)
   (setq font-lock-fontify-region-function 'c-font-lock-fontify-region)