Back out changeset 7996fcc11af9 / porting of bug 609976 due to test failures in mozilla-central and the mozilla-central changeset being backed out

--HG--
extra : rebase_source : 965621c1d283c07eb025781f196f0731dc7e825a

configure.in

@@ -4225,6 +4225,11 @@ if test -n "$SYSTEM_LIBXUL" -a -z "$MOZ_ENABLE_LIBXUL"; then
     AC_MSG_ERROR([--with-system-libxul needs --with-libxul-sdk])
 fi
 
+# split JS out by default to avoid VS2005 PGO crash (bug 591836).
+if test "$OS_ARCH" = "WINNT"; then
+  ENABLE_SHARED_JS=1
+fi
+
 MOZ_ARG_ENABLE_BOOL(shared-js,
 [  --enable-shared-js     Create a shared Javascript library.],
     ENABLE_SHARED_JS=1,