Update {virtual,override} to follow C++11 style in ppapi.

ppapi/shared_impl/array_var.h

 // Copyright (c) 2013 The Chromium 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 PPAPI_SHARED_IMPL_ARRAY_VAR_H_
 #define PPAPI_SHARED_IMPL_ARRAY_VAR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 10 matching lines @@
   typedef std::vector<ScopedPPVar> ElementVector;
 
   ArrayVar();
 
   // Helper function that converts a PP_Var to an ArrayVar. This will return
   // NULL if the PP_Var is not of type PP_VARTYPE_ARRAY or the array cannot be
   // found from the var tracker.
   static ArrayVar* FromPPVar(const PP_Var& var);
 
   // Var overrides.
-  virtual ArrayVar* AsArrayVar() override;
-  virtual PP_VarType GetType() const override;
+  ArrayVar* AsArrayVar() override;
+  PP_VarType GetType() const override;
 
   // The returned PP_Var has had a ref added on behalf of the caller.
   PP_Var Get(uint32_t index) const;
   PP_Bool Set(uint32_t index, const PP_Var& value);
   uint32_t GetLength() const;
   PP_Bool SetLength(uint32_t length);
 
   const ElementVector& elements() const { return elements_; }
 
   ElementVector& elements() { return elements_; }
 
  protected:
-  virtual ~ArrayVar();
+  ~ArrayVar() override;
 
  private:
   ElementVector elements_;
 
   DISALLOW_COPY_AND_ASSIGN(ArrayVar);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_ARRAY_VAR_H_