Introduce ToNumber stub and use it in non-optimized code for to-number conver...

src/code-stubs.h

Index: src/code-stubs.h
===================================================================
--- src/code-stubs.h	(revision 6513)
+++ src/code-stubs.h	(working copy)
@@ -59,6 +59,7 @@
   V(GenericUnaryOp)                      \
   V(RevertToNumber)                      \
   V(ToBoolean)                           \
+  V(ToNumber)                            \
   V(CounterOp)                           \
   V(ArgumentsAccess)                     \
   V(RegExpExec)                          \
@@ -260,6 +261,19 @@
 };
 
 
+class ToNumberStub: public CodeStub {
+ public:
+  ToNumberStub() { }
+
+  void Generate(MacroAssembler* masm);
+
+ private:
+  Major MajorKey() { return ToNumber; }
+  int MinorKey() { return 0; }
+  const char* GetName() { return "ToNumberStub"; }
+};
+
+
 class FastNewClosureStub : public CodeStub {
  public:
   void Generate(MacroAssembler* masm);