Change filter quality when scaling-down in drawImage

third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp

Index: third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp b/third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp
index 395fe34f519f2d3f62b562e585b6a3c1fd6fb837..9d27d218906d7d38319f37ada7d1ea259f467558 100644
--- a/third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp
+++ b/third_party/WebKit/Source/platform/graphics/PaintGeneratedImage.cpp
@@ -10,7 +10,7 @@
 
 namespace blink {
 
-void PaintGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& destRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode)
+void PaintGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& destRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode)
 {
     SkAutoCanvasRestore ar(canvas, true);
     canvas->clipRect(destRect);
@@ -18,7 +18,12 @@ void PaintGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const Flo
     if (destRect.size() != srcRect.size())
         canvas->scale(destRect.width() / srcRect.width(), destRect.height() / srcRect.height());
     canvas->translate(-srcRect.x(), -srcRect.y());
-    canvas->drawPicture(m_picture.get(), nullptr, &paint);
+
+    SkPaint adjustedPaint = paint;
+    if (!imageSmoothingEnabled && Image::isDrawScalingDown(srcRect, destRect))
+        adjustedPaint.setFilterQuality(kLow_SkFilterQuality);
+
+    canvas->drawPicture(m_picture.get(), nullptr, &adjustedPaint);
 }
 
 void PaintGeneratedImage::drawTile(GraphicsContext& context, const FloatRect& srcRect)