Fix virtual/override/final usage in Source/modules/.

Source/modules/webgl/WebGLVertexArrayObjectBase.h

 // Copyright 2015 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 WebGLVertexArrayObjectBase_h
 #define WebGLVertexArrayObjectBase_h
 
 #include "modules/webgl/WebGLBuffer.h"
 #include "modules/webgl/WebGLContextObject.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 class WebGLVertexArrayObjectBase : public WebGLContextObject {
 public:
     enum VaoType {
         VaoTypeDefault,
         VaoTypeUser,
     };
 
-    virtual ~WebGLVertexArrayObjectBase();
+    ~WebGLVertexArrayObjectBase() override;
 
     Platform3DObject object() const { return m_object; }
 
     // Cached values for vertex attrib range checks
     class VertexAttribState final : public NoBaseWillBeGarbageCollected<VertexAttribState> {
     public:
         VertexAttribState()
             : enabled(false)
             , bytesPerElement(0)
             , size(4)
@@ skipping 50 matching lines @@
 #if ENABLE(OILPAN)
     bool m_destructionInProgress;
 #endif
     RefPtrWillBeMember<WebGLBuffer> m_boundElementArrayBuffer;
     WillBeHeapVector<OwnPtrWillBeMember<VertexAttribState>> m_vertexAttribState;
 };
 
 } // namespace blink
 
 #endif // WebGLVertexArrayObjectBase_h