Add --enable-ender-lite flag (off by default)

config/autoconf.mk.in

@@ -70,6 +70,7 @@ NO_NETSCAPE_STATIC = @NO_STATIC_LIB@
 ENABLE_TESTS	= @ENABLE_TESTS@
 BUILD_IDLC = @BUILD_IDLC@
 NEED_BASE_DLL_NAME_ALSO = @NEED_BASE_DLL_NAME_ALSO@
+MOZ_ENDER_LITE = @MOZ_ENDER_LITE@
 
 MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS = @MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS@
 MOZ_COMPONENT_NSPR_LIBS=@MOZ_COMPONENT_NSPR_LIBS@

configure.in

@@ -2638,6 +2638,16 @@ if test "$MOZ_MAIL_NEWS"; then
 fi
 AC_SUBST(MOZ_MAIL_NEWS)
 
+dnl Turn on the new lightweight gfx text control frames
+MOZ_ENDER_LITE=0
+MOZ_ARG_ENABLE_BOOL(ender-lite,
+[  --enable-ender-lite      Enable new lightweight text control frames],
+  MOZ_ENDER_LITE=1 )
+if test "$MOZ_ENDER_LITE"; then
+  AC_DEFINE(MOZ_ENDER_LITE)
+fi
+AC_SUBST(MOZ_ENDER_LITE)
+
 dnl make sure that we compile in multi-processor support
 NS_MT_SUPPORTED=1
 AC_DEFINE(NS_MT_SUPPORTED)