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

Source/core/frame/RemoteFrameView.h

 // Copyright 2014 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 RemoteFrameView_h
 #define RemoteFrameView_h
 
 #include "platform/Widget.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class RemoteFrame;
 
 class RemoteFrameView final : public Widget {
 public:
     static PassRefPtrWillBeRawPtr<RemoteFrameView> create(RemoteFrame*);
 
-    virtual ~RemoteFrameView();
+    ~RemoteFrameView() override;
 
-    virtual bool isRemoteFrameView() const override { return true; }
+    bool isRemoteFrameView() const override { return true; }
 
     RemoteFrame& frame() const
     {
         ASSERT(m_remoteFrame);
         return *m_remoteFrame;
     }
 
     // Override to notify remote frame that its viewport size has changed.
-    virtual void frameRectsChanged() override;
+    void frameRectsChanged() override;
 
-    virtual void invalidateRect(const IntRect&) override;
+    void invalidateRect(const IntRect&) override;
 
-    virtual void setFrameRect(const IntRect&) override;
+    void setFrameRect(const IntRect&) override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit RemoteFrameView(RemoteFrame*);
 
     // The properties and handling of the cycle between RemoteFrame
     // and its RemoteFrameView corresponds to that between LocalFrame
     // and FrameView. Please see the FrameView::m_frame comment for
     // details.
     RefPtrWillBeMember<RemoteFrame> m_remoteFrame;
 };
 
 DEFINE_TYPE_CASTS(RemoteFrameView, Widget, widget, widget->isRemoteFrameView(), widget.isRemoteFrameView());
 
 } // namespace blink
 
 #endif // RemoteFrameView_h