Move global code for builtins into setup functions.

src/regexp.js

Index: src/regexp.js
diff --git a/src/regexp.js b/src/regexp.js
index 2349ca7fbc92a9973484bc9645420e645ad98d31..cb11ad107cf130ec8480ded2cf88c791d40c88cf 100644
--- a/src/regexp.js
+++ b/src/regexp.js
@@ -25,11 +25,15 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Expect $Object = global.Object;
-// Expect $Array = global.Array;
+// This file relies on the fact that the following declaration has been made
+// in runtime.js:
+// var $Object = global.Object;
+// var $Array = global.Array;
 
 var $RegExp = global.RegExp;
 
+// -------------------------------------------------------------------
+
 // A recursive descent parser for Patterns according to the grammar of
 // ECMA-262 15.10.1, with deviations noted below.
 function DoConstructRegExp(object, pattern, flags) {