Fix virtual/override/final usage in the rest of Source/core/.

Source/core/inspector/InspectorTimelineAgent.h

 /*
 * Copyright (C) 2012 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 32 matching lines @@
 class CORE_EXPORT InspectorTimelineAgent final
     : public InspectorBaseAgent<InspectorTimelineAgent, InspectorFrontend::Timeline>
     , public InspectorBackendDispatcher::TimelineCommandHandler {
     WTF_MAKE_NONCOPYABLE(InspectorTimelineAgent);
 public:
     static PassOwnPtrWillBeRawPtr<InspectorTimelineAgent> create()
     {
         return adoptPtrWillBeNoop(new InspectorTimelineAgent());
     }
 
-    virtual ~InspectorTimelineAgent();
+    ~InspectorTimelineAgent() override;
 
-    virtual void enable(ErrorString*) override;
-    virtual void disable(ErrorString*) override;
-    virtual void start(ErrorString*, const int* maxCallStackDepth, const bool* bufferEvents, const String* liveEvents, const bool* includeCounters, const bool* includeGPUEvents) override;
-    virtual void stop(ErrorString*) override;
+    void enable(ErrorString*) override;
+    void disable(ErrorString*) override;
+    void start(ErrorString*, const int* maxCallStackDepth, const bool* bufferEvents, const String* liveEvents, const bool* includeCounters, const bool* includeGPUEvents) override;
+    void stop(ErrorString*) override;
 
 private:
     InspectorTimelineAgent();
 };
 
 } // namespace blink
 
 #endif // !defined(InspectorTimelineAgent_h)