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

src/parsing/parser.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_PARSING_PARSER_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 1071 matching lines @@
 
   // Implement sloppy block-scoped functions, ES2015 Annex B 3.3
   void InsertSloppyBlockFunctionVarBindings(DeclarationScope* scope,
                                             Scope* complex_params_scope,
                                             bool* ok);
 
   static InitializationFlag DefaultInitializationFlag(VariableMode mode);
   VariableProxy* NewUnresolved(const AstRawString* name, VariableMode mode);
   Variable* Declare(Declaration* declaration,
                     DeclarationDescriptor::Kind declaration_kind,
-                    InitializationFlag init, bool* ok,
+                    VariableMode mode, InitializationFlag init, bool* ok,
                     Scope* declaration_scope = nullptr);
   Declaration* DeclareVariable(const AstRawString* name, VariableMode mode,
                                int pos, bool* ok);
   Declaration* DeclareVariable(const AstRawString* name, VariableMode mode,
                                InitializationFlag init, int pos, bool* ok);
 
   bool TargetStackContainsLabel(const AstRawString* label);
   BreakableStatement* LookupBreakTarget(const AstRawString* label, bool* ok);
   IterationStatement* LookupContinueTarget(const AstRawString* label, bool* ok);
 
@@ skipping 270 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_