Allow the optimizing code generator to call Math.pow with untagged doubles.

src/serialize.cc

Index: src/serialize.cc
===================================================================
--- src/serialize.cc	(revision 5948)
+++ src/serialize.cc	(working copy)
@@ -486,6 +486,18 @@
       UNCLASSIFIED,
       36,
       "LDoubleConstant::one_half");
+  Add(ExternalReference::address_of_negative_infinity().address(),
+      UNCLASSIFIED,
+      37,
+      "LDoubleConstant::negative_infinity");
+  Add(ExternalReference::power_double_double_function().address(),
+      UNCLASSIFIED,
+      38,
+      "power_double_double_function");
+  Add(ExternalReference::power_double_int_function().address(),
+      UNCLASSIFIED,
+      39,
+      "power_double_int_function");
 }