Add a few missing overrides found by a new clang warning.

src/typing.h

 // Copyright 2013 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_TYPING_H_
 #define V8_TYPING_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 54 matching lines @@
   int stack_local_index(int index) { return index; }
 
   int variable_index(Variable* var) {
     // Stack locals have the range [0 .. l]
     // Parameters have the range [-1 .. p]
     // We map this to [-p-2 .. -1, 0 .. l]
     return var->IsStackLocal() ? stack_local_index(var->index()) :
            var->IsParameter() ? parameter_index(var->index()) : kNoVar;
   }
 
   void VisitDeclarations(ZoneList<Declaration*>* declarations);

[Jakob Kummerow, 2014/10/29 10:17:45]

...and one more VisitDeclarations

[Nico, 2014/10/29 15:43:39]

Yes:
https://code.google.com/p/v8/issues/attachmentText?id=3658&aid=36580003000&na...

   void VisitStatements(ZoneList<Statement*>* statements);

[Nico, 2014/10/29 15:43:39]

This one too:
https://code.google.com/p/v8/issues/attachmentText?id=3658&aid=36580003000&na...

 
-#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node) OVERRIDE;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   DISALLOW_COPY_AND_ASSIGN(AstTyper);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPING_H_