Missing *explicit* keyword in constructors

Source/core/rendering/svg/RenderSVGResourcePattern.h

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 26 matching lines @@
 
 struct PatternData {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     RefPtr<Pattern> pattern;
     AffineTransform transform;
 };
 
 class RenderSVGResourcePattern FINAL : public RenderSVGResourceContainer {
 public:
-    RenderSVGResourcePattern(SVGPatternElement*);
+    explicit RenderSVGResourcePattern(SVGPatternElement*);
 
     virtual const char* renderName() const { return "RenderSVGResourcePattern"; }
 
     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*);
     virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }
 
@@ skipping 10 matching lines @@
     PatternData* buildPattern(RenderObject*, unsigned short resourceMode);
 
     bool m_shouldCollectPatternAttributes : 1;
     PatternAttributes m_attributes;
     HashMap<RenderObject*, OwnPtr<PatternData> > m_patternMap;
 };
 
 }
 
 #endif