Pass InterpolationQuality into DragImage to respect image-rendering:pixelated.

Source/core/page/DragController.cpp

Index: Source/core/page/DragController.cpp
diff --git a/Source/core/page/DragController.cpp b/Source/core/page/DragController.cpp
index 054eabfc828fe99260e516de398edafe243d4c38..7799f38a239ebb52c70a193a513606f73f20d533 100644
--- a/Source/core/page/DragController.cpp
+++ b/Source/core/page/DragController.cpp
@@ -826,8 +826,9 @@ static PassOwnPtr<DragImage> dragImageForImage(Element* element, Image* image, c
     OwnPtr<DragImage> dragImage;
     IntPoint origin;
 
+    DragImage::ResizeMethod resizeMethod = element->computedStyle()->imageRendering() == ImageRenderingPixelated ? DragImage::ResizeMethod::RESIZE_BOX : DragImage::ResizeMethod::RESIZE_LANCZOS3;

[Justin Novosad, 2015/02/05 05:06:24]

RESIZE_BOX does not exactly match how "image-rendering:pixelated" is handled
elsewhere in the code where InterpolationNone is used. When down-resing,
RESIZE_BOX takes a weighted average rather than nearest neighbor. As far as the
spec is concerned, this is probably okay. But consistency with the rest of blink
is an issue.

     if (image->size().height() * image->size().width() <= MaxOriginalImageArea
-        && (dragImage = DragImage::create(image, element->renderer() ? element->renderer()->shouldRespectImageOrientation() : DoNotRespectImageOrientation))) {
+        && (dragImage = DragImage::create(image, element->renderer() ? element->renderer()->shouldRespectImageOrientation() : DoNotRespectImageOrientation, 1 /* deviceScaleFactor */, resizeMethod))) {
         IntSize originalSize = imageRect.size();
         origin = imageRect.location();