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

Source/core/html/HTMLCanvasElement.cpp

Index: Source/core/html/HTMLCanvasElement.cpp
diff --git a/Source/core/html/HTMLCanvasElement.cpp b/Source/core/html/HTMLCanvasElement.cpp
index 280951c60fb930e5a2395dff36bbfb5ee6822adc..32c148c4b88d946115c3c4ce1e23f5be46fe9333 100644
--- a/Source/core/html/HTMLCanvasElement.cpp
+++ b/Source/core/html/HTMLCanvasElement.cpp
@@ -170,7 +170,7 @@ CanvasRenderingContext* HTMLCanvasElement::getContext(const String& type, Canvas
             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();
         }