[ast][parser] Remove redundant Declaration::mode_.

src/ast/ast.h

 // Copyright 2012 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_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
 #include "src/ast/variables.h"
@@ skipping 477 matching lines @@
 
   Block* block_;
   VariableProxy* result_;
   FunctionLiteral* represented_function_;
 };
 
 
 class Declaration : public AstNode {
  public:
   VariableProxy* proxy() const { return proxy_; }
-  VariableMode mode() const { return mode_; }
   Scope* scope() const { return scope_; }
 
  protected:
-  Declaration(VariableProxy* proxy, VariableMode mode, Scope* scope, int pos,
-              NodeType type)
-      : AstNode(pos, type), mode_(mode), proxy_(proxy), scope_(scope) {
-    DCHECK(IsDeclaredVariableMode(mode));
-  }
+  Declaration(VariableProxy* proxy, Scope* scope, int pos, NodeType type)
+      : AstNode(pos, type), proxy_(proxy), scope_(scope) {}
 
  private:
-  VariableMode mode_;
   VariableProxy* proxy_;
 
   // Nested scope from which the declaration originated.
   Scope* scope_;
 };
 
 
 class VariableDeclaration final : public Declaration {
  private:
   friend class AstNodeFactory;
 
-  VariableDeclaration(VariableProxy* proxy, VariableMode mode, Scope* scope,
-                      int pos)
-      : Declaration(proxy, mode, scope, pos, kVariableDeclaration) {}
+  VariableDeclaration(VariableProxy* proxy, Scope* scope, int pos)
+      : Declaration(proxy, scope, pos, kVariableDeclaration) {}
 };
 
 
 class FunctionDeclaration final : public Declaration {
  public:
   FunctionLiteral* fun() const { return fun_; }
   void set_fun(FunctionLiteral* f) { fun_ = f; }
 
  private:
   friend class AstNodeFactory;
 
-  FunctionDeclaration(VariableProxy* proxy, VariableMode mode,
-                      FunctionLiteral* fun, Scope* scope, int pos)
-      : Declaration(proxy, mode, scope, pos, kFunctionDeclaration), fun_(fun) {
-    DCHECK(mode == VAR || mode == LET || mode == CONST);
+  FunctionDeclaration(VariableProxy* proxy, FunctionLiteral* fun, Scope* scope,
+                      int pos)
+      : Declaration(proxy, scope, pos, kFunctionDeclaration), fun_(fun) {
     DCHECK(fun != NULL);
   }
 
   FunctionLiteral* fun_;
 };
 
 
 class IterationStatement : public BreakableStatement {
  public:
   Statement* body() const { return body_; }
@@ skipping 2446 matching lines @@
     }
   }
 
   AstValueFactory* ast_value_factory() const { return ast_value_factory_; }
   void set_ast_value_factory(AstValueFactory* ast_value_factory) {
     ast_value_factory_ = ast_value_factory;
     zone_ = ast_value_factory->zone();
   }
 
   VariableDeclaration* NewVariableDeclaration(VariableProxy* proxy,
-                                              VariableMode mode, Scope* scope,
-                                              int pos) {
-    return new (zone_) VariableDeclaration(proxy, mode, scope, pos);
+                                              Scope* scope, int pos) {
+    return new (zone_) VariableDeclaration(proxy, scope, pos);
   }
 
   FunctionDeclaration* NewFunctionDeclaration(VariableProxy* proxy,
-                                              VariableMode mode,
                                               FunctionLiteral* fun,
-                                              Scope* scope,
-                                              int pos) {
-    return new (zone_) FunctionDeclaration(proxy, mode, fun, scope, pos);
+                                              Scope* scope, int pos) {
+    return new (zone_) FunctionDeclaration(proxy, fun, scope, pos);
   }
 
   Block* NewBlock(ZoneList<const AstRawString*>* labels, int capacity,
                   bool ignore_completion_value, int pos) {
     return new (zone_)
         Block(zone_, labels, capacity, ignore_completion_value, pos);
   }
 
 #define STATEMENT_WITH_LABELS(NodeType)                                     \
   NodeType* New##NodeType(ZoneList<const AstRawString*>* labels, int pos) { \
@@ skipping 448 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_