Update web classes to use OVERRIDE / FINAL when needed

Source/web/WebFileChooserCompletionImpl.h

Index: Source/web/WebFileChooserCompletionImpl.h
diff --git a/Source/web/WebFileChooserCompletionImpl.h b/Source/web/WebFileChooserCompletionImpl.h
index dd43c305274178c514facc61af18d828539a034f..7fa1a1765c4a27819ca1508b8f1e6d83e8cf801b 100644
--- a/Source/web/WebFileChooserCompletionImpl.h
+++ b/Source/web/WebFileChooserCompletionImpl.h
@@ -43,12 +43,12 @@ using blink::WebVector;
 
 namespace blink {
 
-class WebFileChooserCompletionImpl : public WebFileChooserCompletion {
+class WebFileChooserCompletionImpl FINAL : public WebFileChooserCompletion {
 public:
     WebFileChooserCompletionImpl(PassRefPtr<WebCore::FileChooser> chooser);
-    ~WebFileChooserCompletionImpl();
-    virtual void didChooseFile(const WebVector<WebString>& fileNames);
-    virtual void didChooseFile(const WebVector<SelectedFileInfo>& files);
+    virtual ~WebFileChooserCompletionImpl();
+    virtual void didChooseFile(const WebVector<WebString>& fileNames) OVERRIDE;
+    virtual void didChooseFile(const WebVector<SelectedFileInfo>& files) OVERRIDE;
 private:
     RefPtr<WebCore::FileChooser> m_fileChooser;
 };