Hydrogen: Re-use regular comparisons infrastructure for switch statements

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index cfcb05702435c24499708107f1b132b7e8f77b7b..bd43e12b968f8039e2f1fe96e5bd1a6e87a5a2d2 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1145,16 +1145,11 @@ class SwitchStatement V8_FINAL : public BreakableStatement {
   void Initialize(Expression* tag, ZoneList<CaseClause*>* cases) {
     tag_ = tag;
     cases_ = cases;
-    switch_type_ = UNKNOWN_SWITCH;
   }
 
   Expression* tag() const { return tag_; }
   ZoneList<CaseClause*>* cases() const { return cases_; }
 
-  enum SwitchType { UNKNOWN_SWITCH, SMI_SWITCH, STRING_SWITCH, GENERIC_SWITCH };
-  SwitchType switch_type() const { return switch_type_; }
-  void set_switch_type(SwitchType switch_type) { switch_type_ = switch_type; }
-
  protected:
   SwitchStatement(Isolate* isolate, ZoneStringList* labels, int pos)
       : BreakableStatement(isolate, labels, TARGET_FOR_ANONYMOUS, pos),
@@ -1164,7 +1159,6 @@ class SwitchStatement V8_FINAL : public BreakableStatement {
  private:
   Expression* tag_;
   ZoneList<CaseClause*>* cases_;
-  SwitchType switch_type_;
 };