Missing explicit keyword in ctor of FooImpl.h

Source/web/ContextMenuClientImpl.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 22 matching lines @@
 
 #include "core/page/ContextMenuClient.h"
 
 namespace blink {
 
 class WebViewImpl;
 struct WebContextMenuData;
 
 class ContextMenuClientImpl FINAL : public blink::ContextMenuClient {
 public:
-    ContextMenuClientImpl(WebViewImpl* webView) : m_webView(webView) {}
+    explicit ContextMenuClientImpl(WebViewImpl* webView) : m_webView(webView) { }
     virtual ~ContextMenuClientImpl() {}
     virtual void showContextMenu(const blink::ContextMenu*) OVERRIDE;
     virtual void clearContextMenu() OVERRIDE;
 private:
     void populateCustomMenuItems(const blink::ContextMenu*, WebContextMenuData*);
     WebViewImpl* m_webView;
 };
 
 } // namespace blink
 
 #endif // ContextMenuClientImpl_h