Revert of [builtins] Refactor the remaining Date builtins.

src/compiler/js-intrinsic-lowering.h

Index: src/compiler/js-intrinsic-lowering.h
diff --git a/src/compiler/js-intrinsic-lowering.h b/src/compiler/js-intrinsic-lowering.h
index 1977a5847d858f6acdbf2153acfdab926e668d70..7ccbf10ff36e3921ae8944ba7722863a6ae055a3 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -40,6 +40,7 @@
  private:
   Reduction ReduceConstructDouble(Node* node);
   Reduction ReduceCreateIterResultObject(Node* node);
+  Reduction ReduceDateField(Node* node);
   Reduction ReduceDeoptimizeNow(Node* node);
   Reduction ReduceDoubleHi(Node* node);
   Reduction ReduceDoubleLo(Node* node);
@@ -61,6 +62,7 @@
   Reduction ReduceRegExpFlags(Node* node);
   Reduction ReduceRegExpSource(Node* node);
   Reduction ReduceSubString(Node* node);
+  Reduction ReduceThrowNotDateError(Node* node);
   Reduction ReduceToInteger(Node* node);
   Reduction ReduceToLength(Node* node);
   Reduction ReduceToName(Node* node);