Added fast support for Math.pow. This simply calculates the result using the...

src/x64/codegen-x64.h

Index: src/x64/codegen-x64.h
===================================================================
--- src/x64/codegen-x64.h	(revision 3937)
+++ src/x64/codegen-x64.h	(working copy)
@@ -572,6 +572,9 @@
   // Fast support for number to string.
   void GenerateNumberToString(ZoneList<Expression*>* args);
 
+  // Fast support for Math.pow().
+  void GeneratePow(ZoneList<Expression*>* args);
+
   // Fast call to math functions.
   void GenerateMathSin(ZoneList<Expression*>* args);
   void GenerateMathCos(ZoneList<Expression*>* args);