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

Source/bindings/core/v8/V8GCController.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 90 matching lines @@
 }
 
 // Regarding a minor GC algorithm for DOM nodes, see this document:
 // https://docs.google.com/a/google.com/presentation/d/1uifwVYGNYTZDoGLyCb7sXa7g49mWNMW2gaWvMN5NLk8/edit#slide=id.p
 class MinorGCWrapperVisitor : public v8::PersistentHandleVisitor {
 public:
     explicit MinorGCWrapperVisitor(v8::Isolate* isolate)
         : m_isolate(isolate)
     { }
 
-    virtual void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
+    void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
     {
         // A minor DOM GC can collect only Nodes.
         if (classId != WrapperTypeInfo::NodeClassId)
             return;
 
         // To make minor GC cycle time bounded, we limit the number of wrappers handled
         // by each minor GC cycle to 10000. This value was selected so that the minor
         // GC cycle time is bounded to 20 ms in a case where the new space size
         // is 16 MB and it is full of wrappers (which is almost the worst case).
         // Practically speaking, as far as I crawled real web applications,
@@ skipping 121 matching lines @@
 class MajorGCWrapperVisitor : public v8::PersistentHandleVisitor {
 public:
     explicit MajorGCWrapperVisitor(v8::Isolate* isolate, bool constructRetainedObjectInfos)
         : m_isolate(isolate)
         , m_domObjectsWithPendingActivity(0)
         , m_liveRootGroupIdSet(false)
         , m_constructRetainedObjectInfos(constructRetainedObjectInfos)
     {
     }
 
-    virtual void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
+    void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
     {
         if (classId != WrapperTypeInfo::NodeClassId && classId != WrapperTypeInfo::ObjectClassId)
             return;
 
         v8::Local<v8::Object> wrapper = v8::Local<v8::Object>::New(m_isolate, v8::Persistent<v8::Object>::Cast(*value));
         ASSERT(V8DOMWrapper::hasInternalFieldsSet(wrapper));
 
         if (value->IsIndependent())
             return;
 
@@ skipping 215 matching lines @@
     lastUsageReportedToV8 = currentUsage;
 }
 
 class DOMWrapperTracer : public v8::PersistentHandleVisitor {
 public:
     explicit DOMWrapperTracer(Visitor* visitor)
         : m_visitor(visitor)
     {
     }
 
-    virtual void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
+    void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) override
     {
         if (classId != WrapperTypeInfo::NodeClassId && classId != WrapperTypeInfo::ObjectClassId)
             return;
 
         const v8::Persistent<v8::Object>& wrapper = v8::Persistent<v8::Object>::Cast(*value);
 
         if (m_visitor)
             toWrapperTypeInfo(wrapper)->trace(m_visitor, toScriptWrappable(wrapper));
     }
 
 private:
     Visitor* m_visitor;
 };
 
 void V8GCController::traceDOMWrappers(v8::Isolate* isolate, Visitor* visitor)
 {
     DOMWrapperTracer tracer(visitor);
     v8::V8::VisitHandlesWithClassIds(isolate, &tracer);
 }
 
 } // namespace blink