Missing *explicit* keyword in constructors

Source/core/rendering/svg/RenderSVGResourceClipper.h

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 19 matching lines @@
 public:
     enum ClipMode { PathOnlyClipMode, MaskClipMode };
 
     // We should eventually cache the combined clip path here, when switching to path ops clipping.
     // For now we only cache a marker to let postApply know whether it needs to perform any work.
     ClipMode clipMode;
 };
 
 class RenderSVGResourceClipper FINAL : public RenderSVGResourceContainer {
 public:
-    RenderSVGResourceClipper(SVGClipPathElement*);
+    explicit RenderSVGResourceClipper(SVGClipPathElement*);
     virtual ~RenderSVGResourceClipper();
 
     virtual const char* renderName() const { return "RenderSVGResourceClipper"; }
 
     virtual void removeAllClientsFromCache(bool markForInvalidation = true);
     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
 
     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) OVERRIDE;
     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*, const RenderSVGShape*) OVERRIDE;
     // clipPath can be clipped too, but don't have a boundingBox or repaintRect. So we can't call
@@ skipping 24 matching lines @@
 
 inline RenderSVGResourceClipper* toRenderSVGResourceClipper(RenderSVGResource* resource)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!resource || resource->resourceType() == ClipperResourceType);
     return static_cast<RenderSVGResourceClipper*>(resource);
 }
 
 }
 
 #endif