Add number() static methods to AtomicString class

Source/core/html/HTMLProgressElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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 76 matching lines @@
 
 void HTMLProgressElement::attach(const AttachContext& context)
 {
     LabelableElement::attach(context);
     if (RenderProgress* render = renderProgress())
         render->updateFromElement();
 }
 
 double HTMLProgressElement::value() const
 {
-    double value = parseToDoubleForNumberType(fastGetAttribute(valueAttr));
+    double value = getFloatingPointAttribute(valueAttr);
     return !std::isfinite(value) || value < 0 ? 0 : std::min(value, max());
 }
 
 void HTMLProgressElement::setValue(double value, ExceptionState& exceptionState)
 {
     if (!std::isfinite(value)) {
         exceptionState.throwDOMException(NotSupportedError, ExceptionMessages::failedToSet("value", "HTMLProgressElement", ExceptionMessages::notAFiniteNumber(value)));
         return;
     }
-    setAttribute(valueAttr, String::number(value >= 0 ? value : 0));
+    setFloatingPointAttribute(valueAttr, std::max(value, 0.));
 }
 
 double HTMLProgressElement::max() const
 {
-    double max = parseToDoubleForNumberType(getAttribute(maxAttr));
+    double max = getFloatingPointAttribute(maxAttr);
     return !std::isfinite(max) || max <= 0 ? 1 : max;
 }
 
 void HTMLProgressElement::setMax(double max, ExceptionState& exceptionState)
 {
     if (!std::isfinite(max)) {
         exceptionState.throwDOMException(NotSupportedError, ExceptionMessages::failedToSet("max", "HTMLProgressElement", ExceptionMessages::notAFiniteNumber(max)));
         return;
     }
-    setAttribute(maxAttr, String::number(max > 0 ? max : 1));
+    // FIXME: The specification says we should ignore the input value if it is inferior or equal to 0.
+    setFloatingPointAttribute(maxAttr, max > 0 ? max : 1);
 }
 
 double HTMLProgressElement::position() const
 {
     if (!isDeterminate())
         return HTMLProgressElement::IndeterminatePosition;
     return value() / max();
 }
 
 bool HTMLProgressElement::isDeterminate() const
@@ skipping 30 matching lines @@
 
     inner->appendChild(bar);
 }
 
 bool HTMLProgressElement::shouldAppearIndeterminate() const
 {
     return !isDeterminate();
 }
 
 } // namespace