Rename ExceptionCode constants to use the names in the spec (2/3)

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 365 matching lines @@
     // FIXME: Make isSupportedImageMIMETypeForEncoding threadsafe (to allow this method to be used on a worker thread).
     if (mimeType.isNull() || !MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(lowercaseMimeType))
         lowercaseMimeType = "image/png";
 
     return lowercaseMimeType;
 }
 
 String HTMLCanvasElement::toDataURL(const String& mimeType, const double* quality, ExceptionCode& ec)
 {
     if (!m_originClean) {
-        ec = SECURITY_ERR;
+        ec = SecurityError;
         return String();
     }
 
     if (m_size.isEmpty() || !buffer())
         return String("data:,");
 
     String encodingMimeType = toEncodingMimeType(mimeType);
 
     // Try to get ImageData first, as that may avoid lossy conversions.
     RefPtr<ImageData> imageData = getImageData();
@@ skipping 187 matching lines @@
     HTMLElement::reportMemoryUsage(memoryObjectInfo);
     info.addMember(m_observers, "observers");
     info.addMember(m_context, "context");
     info.addMember(m_imageBuffer, "imageBuffer");
     info.addMember(m_contextStateSaver, "contextStateSaver");
     info.addMember(m_presentedImage, "presentedImage");
     info.addMember(m_copiedImage, "copiedImage");
 }
 
 }