Missing *explicit* keyword in constructors

Source/core/rendering/svg/RenderSVGResourceFilter.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 39 matching lines @@
     FloatRect boundaries;
     FloatRect drawingRegion;
     FloatSize scale;
     FilterDataState state;
 };
 
 class GraphicsContext;
 
 class RenderSVGResourceFilter FINAL : public RenderSVGResourceContainer {
 public:
-    RenderSVGResourceFilter(SVGFilterElement*);
+    explicit RenderSVGResourceFilter(SVGFilterElement*);
     virtual ~RenderSVGResourceFilter();
 
     virtual const char* renderName() const { return "RenderSVGResourceFilter"; }
     virtual bool isSVGResourceFilter() const OVERRIDE { return true; }
 
     virtual void removeAllClientsFromCache(bool markForInvalidation = true);
     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
 
     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*, const RenderSVGShape*);
@@ skipping 25 matching lines @@
 
 inline RenderSVGResourceFilter* toRenderSVGResourceFilter(RenderSVGResourceContainer* resource)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!resource || resource->resourceType() == FilterResourceType);
     return static_cast<RenderSVGResourceFilter*>(resource);
 }
 
 }
 
 #endif