[builtins] Refactor the remaining Date builtins.

src/crankshaft/hydrogen-instructions.h

Index: src/crankshaft/hydrogen-instructions.h
diff --git a/src/crankshaft/hydrogen-instructions.h b/src/crankshaft/hydrogen-instructions.h
index 44dcea0e39eec0f5c3eab5b37562506fbd4bedd4..13ada8c606cfa7a79384bb2c7dfbb8bddfa442fa 100644
--- a/src/crankshaft/hydrogen-instructions.h
+++ b/src/crankshaft/hydrogen-instructions.h
@@ -85,7 +85,6 @@ class LChunkBuilder;
   V(Constant)                                 \
   V(ConstructDouble)                          \
   V(Context)                                  \
-  V(DateField)                                \
   V(DebugBreak)                               \
   V(DeclareGlobals)                           \
   V(Deoptimize)                               \
@@ -7532,28 +7531,6 @@ class HToFastProperties final : public HUnaryOperation {
 };
 
 
-class HDateField final : public HUnaryOperation {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P2(HDateField, HValue*, Smi*);
-
-  Smi* index() const { return index_; }
-
-  Representation RequiredInputRepresentation(int index) override {
-    return Representation::Tagged();
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(DateField)
-
- private:
-  HDateField(HValue* date, Smi* index)
-      : HUnaryOperation(date), index_(index) {
-    set_representation(Representation::Tagged());
-  }
-
-  Smi* index_;
-};
-
-
 class HSeqStringGetChar final : public HTemplateInstruction<2> {
  public:
   static HInstruction* New(Isolate* isolate, Zone* zone, HValue* context,