Revert of Add a separate scope for switch

src/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_PARSER_H_
 #define V8_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/compiler.h"  // TODO(titzer): remove this include dependency
@@ skipping 1054 matching lines @@
       ZoneList<const AstRawString*>* labels, bool* ok);
   IfStatement* ParseIfStatement(ZoneList<const AstRawString*>* labels,
                                 bool* ok);
   Statement* ParseContinueStatement(bool* ok);
   Statement* ParseBreakStatement(ZoneList<const AstRawString*>* labels,
                                  bool* ok);
   Statement* ParseReturnStatement(bool* ok);
   Statement* ParseWithStatement(ZoneList<const AstRawString*>* labels,
                                 bool* ok);
   CaseClause* ParseCaseClause(bool* default_seen_ptr, bool* ok);
-  Statement* ParseSwitchStatement(ZoneList<const AstRawString*>* labels,
-                                  bool* ok);
+  SwitchStatement* ParseSwitchStatement(ZoneList<const AstRawString*>* labels,
+                                        bool* ok);
   DoWhileStatement* ParseDoWhileStatement(ZoneList<const AstRawString*>* labels,
                                           bool* ok);
   WhileStatement* ParseWhileStatement(ZoneList<const AstRawString*>* labels,
                                       bool* ok);
   Statement* ParseForStatement(ZoneList<const AstRawString*>* labels, bool* ok);
   Statement* ParseThrowStatement(bool* ok);
   Expression* MakeCatchContext(Handle<String> id, VariableProxy* value);
   TryStatement* ParseTryStatement(bool* ok);
   DebuggerStatement* ParseDebuggerStatement(bool* ok);
 
@@ skipping 276 matching lines @@
         parser_->BuildParameterInitializationBlock(parameters, ok);
     if (!*ok) return;
     if (init_block != nullptr) {
       body->Add(init_block, parser_->zone());
     }
   }
 }
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_