[turbofan] Some cleanup to the Typer.

src/types.h

Index: src/types.h
diff --git a/src/types.h b/src/types.h
index 228b6d0773181ce1a4c5a37ad4943e27419f6be9..f66be6b3f7bbc2142d1f4b31c03bc0140d45e64d 100644
--- a/src/types.h
+++ b/src/types.h
@@ -221,12 +221,16 @@ namespace internal {
   V(Integral32,          kSigned32 | kUnsigned32) \
   V(PlainNumber,         kIntegral32 | kOtherNumber) \
   V(OrderedNumber,       kPlainNumber | kMinusZero) \
+  V(MinusZeroOrNaN,      kMinusZero | kNaN) \
   V(Number,              kOrderedNumber | kNaN) \
   V(String,              kInternalizedString | kOtherString) \
   V(UniqueName,          kSymbol | kInternalizedString) \
   V(Name,                kSymbol | kString) \
+  V(BooleanOrNumber,     kBoolean | kNumber) \
+  V(NullOrUndefined,     kNull | kUndefined) \
   V(NumberOrString,      kNumber | kString) \
-  V(PlainPrimitive,      kNumberOrString | kBoolean | kNull | kUndefined) \
+  V(NumberOrUndefined,   kNumber | kUndefined) \
+  V(PlainPrimitive,      kNumberOrString | kBoolean | kNullOrUndefined) \
   V(Primitive,           kSymbol | kPlainPrimitive) \
   V(DetectableObject,    kGlobalObject | kOtherObject) \
   V(DetectableReceiver,  kDetectableObject | kProxy) \