Missing explicit keyword in ctor of FooImpl.h

Source/web/WebFileChooserCompletionImpl.h

 /*
  * 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 27 matching lines @@
 #include "wtf/PassRefPtr.h"
 
 using blink::WebFileChooserCompletion;
 using blink::WebString;
 using blink::WebVector;
 
 namespace blink {
 
 class WebFileChooserCompletionImpl FINAL : public WebFileChooserCompletion {
 public:
-    WebFileChooserCompletionImpl(PassRefPtr<blink::FileChooser> chooser);
+    explicit WebFileChooserCompletionImpl(PassRefPtr<blink::FileChooser>);
     virtual ~WebFileChooserCompletionImpl();
     virtual void didChooseFile(const WebVector<WebString>& fileNames) OVERRIDE;
     virtual void didChooseFile(const WebVector<SelectedFileInfo>& files) OVERRIDE;
 private:
     RefPtr<blink::FileChooser> m_fileChooser;
 };
 
 } // namespace blink
 
 #endif