Add number() static methods to AtomicString class

Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 114 matching lines @@
     m_observers.add(observer);
 }
 
 void HTMLCanvasElement::removeObserver(CanvasObserver* observer)
 {
     m_observers.remove(observer);
 }
 
 void HTMLCanvasElement::setHeight(int value)
 {
-    setAttribute(heightAttr, String::number(value));
+    setIntegralAttribute(heightAttr, value);
 }
 
 void HTMLCanvasElement::setWidth(int value)
 {
-    setAttribute(widthAttr, String::number(value));
+    setIntegralAttribute(widthAttr, value);
 }
 
 CanvasRenderingContext* HTMLCanvasElement::getContext(const String& type, CanvasContextAttributes* attrs)
 {
     // A Canvas can either be "2D" or "webgl" but never both. If you request a 2D canvas and the existing
     // context is already 2D, just return that. If the existing context is WebGL, then destroy it
     // before creating a new 2D context. Vice versa when requesting a WebGL canvas. Requesting a
     // context with any other type string will destroy any existing context.
     enum ContextType {
         Context2d,
@@ skipping 400 matching lines @@
     ASSERT(hasImageBuffer() && !m_didFailToCreateImageBuffer);
     IntSize unscaledSize = size();
     IntSize size = convertLogicalToDevice(unscaledSize);
     AffineTransform transform;
     if (size.width() && size.height())
         transform.scaleNonUniform(size.width() / unscaledSize.width(), size.height() / unscaledSize.height());
     return m_imageBuffer->baseTransform() * transform;
 }
 
 }