[Parser] Remove Variable::is_possibly_eval.

src/ast/variables.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_VARIABLES_H_
 #define V8_AST_VARIABLES_H_
 
 #include "src/ast/ast-value-factory.h"
 #include "src/zone.h"
 
@@ skipping 64 matching lines @@
   bool binding_needs_init() const {
     DCHECK(initialization_flag_ != kNeedsInitialization ||
            IsLexicalVariableMode(mode_));
     return initialization_flag_ == kNeedsInitialization;
   }
 
   bool is_function() const { return kind_ == FUNCTION; }
   bool is_this() const { return kind_ == THIS; }
   bool is_arguments() const { return kind_ == ARGUMENTS; }
 
-  // True if the variable is named eval and not known to be shadowed.
-  bool is_possibly_eval(Isolate* isolate,
-                        HandleDereferenceMode deref_mode =
-                            HandleDereferenceMode::kAllowed) const {
-    // Note: it is safe to dereference isolate->factory()->eval_string() here
-    // regardless of |deref_mode| because it is a constant root and so will
-    // never be updated or moved.
-    return !is_this() &&
-           name_is_identical_to(isolate->factory()->eval_string(), deref_mode);
-  }
-
   Variable* local_if_not_shadowed() const {
     DCHECK(mode_ == DYNAMIC_LOCAL && local_if_not_shadowed_ != NULL);
     return local_if_not_shadowed_;
   }
 
   void set_local_if_not_shadowed(Variable* local) {
     local_if_not_shadowed_ = local;
   }
 
   VariableLocation location() const { return location_; }
   int index() const { return index_; }
   InitializationFlag initialization_flag() const {
     return initialization_flag_;
   }
 
   void AllocateTo(VariableLocation location, int index) {
     location_ = location;
     index_ = index;
   }
 
   static int CompareIndex(Variable* const* v, Variable* const* w);
 
  private:
-  bool name_is_identical_to(Handle<Object> object,
-                            HandleDereferenceMode deref_mode) const {
-    if (deref_mode == HandleDereferenceMode::kAllowed) {
-      return *name() == *object;
-    } else {
-      // If handle dereference isn't allowed use the handle address for
-      // identity. This depends on the variable name being internalized in a
-      // CanonicalHandleScope, so that all handles created during the
-      // internalization with identical values have identical locations, and any
-      // handles created which point to roots have the root handle's location.
-      return name().address() == object.address();
-    }
-  }
-
   Scope* scope_;
   const AstRawString* name_;
   VariableMode mode_;
   Kind kind_;
   VariableLocation location_;
   int index_;
   int initializer_position_;
 
   // If this field is set, this variable references the stored locally bound
   // variable, but it might be shadowed by variable bindings introduced by
   // sloppy 'eval' calls between the reference scope (inclusive) and the
   // binding scope (exclusive).
   Variable* local_if_not_shadowed_;
 
   // Usage info.
   bool force_context_allocation_;  // set by variable resolver
   bool is_used_;
   InitializationFlag initialization_flag_;
   MaybeAssignedFlag maybe_assigned_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_VARIABLES_H_