Add support for type checking of floating point arguments as [TypeChecking=Unrestricted]

Source/core/html/canvas/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 1777 matching lines @@
     return nullptr;
 }
 
 PassRefPtrWillBeRawPtr<ImageData> CanvasRenderingContext2D::createImageData(PassRefPtrWillBeRawPtr<ImageData> imageData) const
 {
     return createEmptyImageData(imageData->size());
 }
 
 PassRefPtrWillBeRawPtr<ImageData> CanvasRenderingContext2D::createImageData(float sw, float sh, ExceptionState& exceptionState) const
 {
-    if (!sw || !sh)
+    if (!sw || !sh) {
         exceptionState.throwDOMException(IndexSizeError, String::format("The source %s is 0.", sw ? "height" : "width"));
-    else if (!std::isfinite(sw))
-        exceptionState.throwDOMException(NotSupportedError, ExceptionMessages::notAFiniteNumber(sw, "source width"));
-    else if (!std::isfinite(sh))
-        exceptionState.throwDOMException(NotSupportedError, ExceptionMessages::notAFiniteNumber(sh, "source height"));
-
-    if (exceptionState.hadException())
         return nullptr;
+    }
 
     FloatSize logicalSize(fabs(sw), fabs(sh));
     if (!logicalSize.isExpressibleAsIntSize())
         return nullptr;
 
     IntSize size = expandedIntSize(logicalSize);
     if (size.width() < 1)
         size.setWidth(1);
     if (size.height() < 1)
         size.setHeight(1);
@@ skipping 609 matching lines @@
     c->setAlphaAsFloat(1.0);
     c->clearShadow();
     c->setCompositeOperation(CompositeSourceOver, blink::WebBlendModeNormal);
     c->drawFocusRing(path, focusRingWidth, focusRingOutline, focusRingColor);
     c->restore();
 
     didDraw(dirtyRect);
 }
 
 } // namespace WebCore