Remove canvas 2D context attributes from behind experimental canvas features flag.

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 152 matching lines @@
     };
 
     // FIXME - The code depends on the context not going away once created, to prevent JS from
     // seeing a dangling pointer. So for now we will disallow the context from being changed
     // once it is created.
     if (type == "2d") {
         if (m_context && !m_context->is2d())
             return 0;
         if (!m_context) {
             HistogramSupport::histogramEnumeration("Canvas.ContextType", Context2d, ContextTypeCount);
-            m_context = CanvasRenderingContext2D::create(this, RuntimeEnabledFeatures::experimentalCanvasFeaturesEnabled() ? static_cast<Canvas2DContextAttributes*>(attrs) : 0, document().inQuirksMode());
+            m_context = CanvasRenderingContext2D::create(this, static_cast<Canvas2DContextAttributes*>(attrs), document().inQuirksMode());
             if (m_context)
                 scheduleLayerUpdate();
         }
         return m_context.get();
     }
 
     Settings* settings = document().settings();
     if (settings && settings->webGLEnabled()) {
         // Accept the legacy "webkit-3d" name as well as the provisional "experimental-webgl" name.
         // Now that WebGL is ratified, we will also accept "webgl" as the context name in Chrome.
@@ skipping 396 matching lines @@
     FloatSize unscaledSize = size();
     FloatSize deviceSize = convertLogicalToDevice(unscaledSize);
     IntSize size(deviceSize.width(), deviceSize.height());
     AffineTransform transform;
     if (size.width() && size.height())
         transform.scaleNonUniform(size.width() / unscaledSize.width(), size.height() / unscaledSize.height());
     return m_imageBuffer->baseTransform() * transform;
 }
 
 }