Include what you use for the preparser.

src/strtod.cc

Index: src/strtod.cc
diff --git a/src/strtod.cc b/src/strtod.cc
index be79c80085200dc8015e53687e6e3e9c80f38418..1511d55dc6dbe18d748c1c9df48351066b0a5ce3 100644
--- a/src/strtod.cc
+++ b/src/strtod.cc
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,15 +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.
 
-#include <stdarg.h>
-#include <math.h>
-
-#include "globals.h"
-#include "utils.h"
 #include "strtod.h"
+
 #include "bignum.h"
 #include "cached-powers.h"
+#include "checks.h"
+#include "diy-fp.h"
 #include "double.h"
+#include "globals.h"
+#include "utils.h"
 
 namespace v8 {
 namespace internal {