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

Source/modules/filesystem/DOMFileSystem.h

 /*
  * Copyright (C) 2010 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 42 matching lines @@
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMFileSystem);
 public:
     static DOMFileSystem* create(ExecutionContext*, const String& name, FileSystemType, const KURL& rootURL);
 
     // Creates a new isolated file system for the given filesystemId.
     static DOMFileSystem* createIsolatedFileSystem(ExecutionContext*, const String& filesystemId);
 
     DirectoryEntry* root() const;
 
     // DOMFileSystemBase overrides.
-    virtual void addPendingCallbacks() override;
-    virtual void removePendingCallbacks() override;
-    virtual void reportError(ErrorCallback*, FileError*) override;
+    void addPendingCallbacks() override;
+    void removePendingCallbacks() override;
+    void reportError(ErrorCallback*, FileError*) override;
 
     // ActiveDOMObject overrides.
-    virtual bool hasPendingActivity() const override;
+    bool hasPendingActivity() const override;
 
     void createWriter(const FileEntry*, FileWriterCallback*, ErrorCallback*);
     void createFile(const FileEntry*, FileCallback*, ErrorCallback*);
 
     // Schedule a callback. This should not cross threads (should be called on the same context thread).
     // FIXME: move this to a more generic place.
     template <typename CB, typename CBArg>
     static void scheduleCallback(ExecutionContext*, CB*, CBArg*);
 
     template <typename CB, typename CBArg>
@@ skipping 20 matching lines @@
         scheduleCallback(executionContext(), callback, callbackArg);
     }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     DOMFileSystem(ExecutionContext*, const String& name, FileSystemType, const KURL& rootURL);
 
     class DispatchCallbackTaskBase : public ExecutionContextTask {
     public:
-        virtual String taskNameForInstrumentation() const override
+        String taskNameForInstrumentation() const override
         {
             return "FileSystem";
         }
     };
 
     template <typename CB, typename CBArg>
     class DispatchCallbackPtrArgTask final : public DispatchCallbackTaskBase {
     public:
         DispatchCallbackPtrArgTask(CB* callback, CBArg* arg)
             : m_callback(callback)
             , m_callbackArg(arg)
         {
         }
 
-        virtual void performTask(ExecutionContext*) override
+        void performTask(ExecutionContext*) override
         {
             m_callback->handleEvent(m_callbackArg.get());
         }
 
     private:
         Persistent<CB> m_callback;
         Persistent<CBArg> m_callbackArg;
     };
 
     template <typename CB, typename CBArg>
     class DispatchCallbackNonPtrArgTask final : public DispatchCallbackTaskBase {
     public:
         DispatchCallbackNonPtrArgTask(CB* callback, const CBArg& arg)
             : m_callback(callback)
             , m_callbackArg(arg)
         {
         }
 
-        virtual void performTask(ExecutionContext*) override
+        void performTask(ExecutionContext*) override
         {
             m_callback->handleEvent(m_callbackArg);
         }
 
     private:
         Persistent<CB> m_callback;
         CBArg m_callbackArg;
     };
 
     template <typename CB>
     class DispatchCallbackNoArgTask final : public DispatchCallbackTaskBase {
     public:
         DispatchCallbackNoArgTask(CB* callback)
             : m_callback(callback)
         {
         }
 
-        virtual void performTask(ExecutionContext*) override
+        void performTask(ExecutionContext*) override
         {
             m_callback->handleEvent();
         }
 
     private:
         Persistent<CB> m_callback;
     };
 
     int m_numberOfPendingCallbacks;
     Member<DirectoryEntry> m_rootEntry;
@@ skipping 35 matching lines @@
 void DOMFileSystem::scheduleCallback(ExecutionContext* executionContext, CB* callback)
 {
     ASSERT(executionContext->isContextThread());
     if (callback)
         executionContext->postTask(FROM_HERE, adoptPtr(new DispatchCallbackNoArgTask<CB>(callback)));
 }
 
 } // namespace blink
 
 #endif // DOMFileSystem_h