[date] Refactor the %_DateField intrinsic to be optimizable.

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index ed42124fd571a7cc20785c23bb31e4fc6a71e707..16816348c6ca01805f54c7d185fbcd3af722b5dd 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -179,6 +179,7 @@ namespace internal {
   V(kOperandIsASmiAndNotAName, "Operand is a smi and not a name")              \
   V(kOperandIsASmiAndNotAString, "Operand is a smi and not a string")          \
   V(kOperandIsASmi, "Operand is a smi")                                        \
+  V(kOperandIsNotADate, "Operand is not a date")                               \
   V(kOperandIsNotAName, "Operand is not a name")                               \
   V(kOperandIsNotANumber, "Operand is not a number")                           \
   V(kOperandIsNotASmi, "Operand is not a smi")                                 \