X87: [builtins] Construct builtin frame in String/Number ctors.

src/x87/macro-assembler-x87.h

Index: src/x87/macro-assembler-x87.h
diff --git a/src/x87/macro-assembler-x87.h b/src/x87/macro-assembler-x87.h
index 7e74871c17798f809e92b63ac53607d2eb281284..867a4b79805b9202d7e9186a5014bc831b213a4e 100644
--- a/src/x87/macro-assembler-x87.h
+++ b/src/x87/macro-assembler-x87.h
@@ -911,6 +911,9 @@ class MacroAssembler: public Assembler {
   void EnterFrame(StackFrame::Type type, bool load_constant_pool_pointer_reg);
   void LeaveFrame(StackFrame::Type type);
 
+  void EnterBuiltinFrame(Register context, Register target, Register argc);
+  void LeaveBuiltinFrame(Register context, Register target, Register argc);
+
   // Expects object in eax and returns map with validated enum cache
   // in eax.  Assumes that any other register can be used as a scratch.
   void CheckEnumCache(Label* call_runtime);