Add image-rendering: pixelated.

Source/core/rendering/RenderHTMLCanvas.cpp

Index: Source/core/rendering/RenderHTMLCanvas.cpp
diff --git a/Source/core/rendering/RenderHTMLCanvas.cpp b/Source/core/rendering/RenderHTMLCanvas.cpp
index 41a294209064a7e9999a021ad08e49db18a7d5c8..1aa23b1323f013123e407ad7c3ee5f95934c1d7c 100644
--- a/Source/core/rendering/RenderHTMLCanvas.cpp
+++ b/Source/core/rendering/RenderHTMLCanvas.cpp
@@ -67,7 +67,18 @@ void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& pa
 
     // FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast is set.
     // See bug for more details: crbug.com/353716.
-    InterpolationQuality interpolationQuality = style()->imageRendering() == ImageRenderingOptimizeContrast ? InterpolationLow : CanvasDefaultInterpolationQuality;
+    InterpolationQuality interpolationQuality;
+    switch (style()->imageRendering()) {
+    case ImageRenderingOptimizeContrast:
+        interpolationQuality = InterpolationLow;
+        break;
+    case ImageRenderingPixelated:
+        interpolationQuality = InterpolationNone;
+        break;
+    default:
+        interpolationQuality = CanvasDefaultInterpolationQuality;
+    }
+
     InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
     context->setImageInterpolationQuality(interpolationQuality);
     toHTMLCanvasElement(node())->paint(context, paintRect);