Missing explicit keyword in ctor of FooImpl.h

Source/web/DragClientImpl.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 21 matching lines @@
 #define DragClientImpl_h
 
 #include "core/page/DragActions.h"
 #include "core/page/DragClient.h"
 
 namespace blink {
 class WebViewImpl;
 
 class DragClientImpl FINAL : public blink::DragClient {
 public:
-    DragClientImpl(WebViewImpl* webView) : m_webView(webView) { }
+    explicit DragClientImpl(WebViewImpl* webView) : m_webView(webView) { }
 
     virtual blink::DragDestinationAction actionMaskForDrag(blink::DragData*) OVERRIDE;
     virtual void startDrag(
         blink::DragImage*,
         const blink::IntPoint& dragImageOrigin,
         const blink::IntPoint& eventPos,
         blink::DataTransfer*,
         blink::LocalFrame* frame,
         bool isLinkDrag = false) OVERRIDE;
 
 private:
     WebViewImpl* m_webView;
 };
 
 } // namespace blink
 
 #endif