Add number() static methods to AtomicString class

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. 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 96 matching lines @@
     const AtomicString& getAttribute(const QualifiedName&) const;
     void setAttribute(const QualifiedName&, const AtomicString& value);
     void setSynchronizedLazyAttribute(const QualifiedName&, const AtomicString& value);
     void removeAttribute(const QualifiedName&);
 
     // Typed getters and setters for language bindings.
     int getIntegralAttribute(const QualifiedName& attributeName) const;
     void setIntegralAttribute(const QualifiedName& attributeName, int value);
     unsigned getUnsignedIntegralAttribute(const QualifiedName& attributeName) const;
     void setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value);
+    double getFloatingPointAttribute(const QualifiedName& attributeName, double fallbackValue = std::numeric_limits<double>::quiet_NaN()) const;
+    void setFloatingPointAttribute(const QualifiedName& attributeName, double value);
 
     // Call this to get the value of an attribute that is known not to be the style
     // attribute or one of the SVG animatable attributes.
     bool fastHasAttribute(const QualifiedName&) const;
     const AtomicString& fastGetAttribute(const QualifiedName&) const;
 #ifndef NDEBUG
     bool fastAttributeLookupAllowed(const QualifiedName&) const;
 #endif
 
 #ifdef DUMP_NODE_STATISTICS
@@ skipping 759 matching lines @@
 }
 
 inline bool isShadowHost(const Element* element)
 {
     return element && element->shadow();
 }
 
 } // namespace
 
 #endif