Improve filtering quality of images downsampled in 2d canvas

Source/core/html/canvas/CanvasRenderingContext2DState.cpp

Index: Source/core/html/canvas/CanvasRenderingContext2DState.cpp
diff --git a/Source/core/html/canvas/CanvasRenderingContext2DState.cpp b/Source/core/html/canvas/CanvasRenderingContext2DState.cpp
index fc4102e0c6e20136fd2454e8aaafa1cf9d17859c..3aebf600c88993927f2fe9cd2ac93a86f6a0894f 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2DState.cpp
+++ b/Source/core/html/canvas/CanvasRenderingContext2DState.cpp
@@ -404,7 +404,7 @@ SkXfermode::Mode CanvasRenderingContext2DState::globalComposite() const
 
 void CanvasRenderingContext2DState::setImageSmoothingEnabled(bool enabled)
 {
-    SkFilterQuality filterQuality = enabled ? kLow_SkFilterQuality : kNone_SkFilterQuality;
+    SkFilterQuality filterQuality = enabled ? kMedium_SkFilterQuality : kNone_SkFilterQuality;
     m_strokePaint.setFilterQuality(filterQuality);
     m_fillPaint.setFilterQuality(filterQuality);
     m_imagePaint.setFilterQuality(filterQuality);
@@ -412,7 +412,7 @@ void CanvasRenderingContext2DState::setImageSmoothingEnabled(bool enabled)
 
 bool CanvasRenderingContext2DState::imageSmoothingEnabled() const
 {
-    return m_imagePaint.getFilterQuality() == kLow_SkFilterQuality;
+    return m_imagePaint.getFilterQuality() == kMedium_SkFilterQuality;
 }
 
 bool CanvasRenderingContext2DState::shouldDrawShadows() const