[cleanup] Remove dead code from DeclareLookupSlot and rename it

src/ast/variables.h

Index: src/ast/variables.h
diff --git a/src/ast/variables.h b/src/ast/variables.h
index b8bb07eab7afcba33148fb708c12790f7db5e510..7d54bc09c4d8d77d52f2b53ba8b398d6bd50c499 100644
--- a/src/ast/variables.h
+++ b/src/ast/variables.h
@@ -119,21 +119,8 @@ class Variable: public ZoneObject {
     index_ = index;
   }
 
-  void SetFromEval() { is_from_eval_ = true; }
-
   static int CompareIndex(Variable* const* v, Variable* const* w);
 
-  PropertyAttributes DeclarationPropertyAttributes() const {
-    int property_attributes = NONE;
-    if (IsImmutableVariableMode(mode_)) {
-      property_attributes |= READ_ONLY;
-    }
-    if (is_from_eval_) {
-      property_attributes |= EVAL_DECLARED;
-    }
-    return static_cast<PropertyAttributes>(property_attributes);
-  }
-
  private:
   Scope* scope_;
   const AstRawString* name_;
@@ -149,9 +136,6 @@ class Variable: public ZoneObject {
   // binding scope (exclusive).
   Variable* local_if_not_shadowed_;
 
-  // True if this variable is introduced by a sloppy eval
-  bool is_from_eval_;
-
   // Usage info.
   bool force_context_allocation_;  // set by variable resolver
   bool is_used_;