Change clear() to respect the clip

src/utils/SkNWayCanvas.cpp

Index: src/utils/SkNWayCanvas.cpp
diff --git a/src/utils/SkNWayCanvas.cpp b/src/utils/SkNWayCanvas.cpp
index a6722d8364d6fe010f42eb59edcd47f53d66cf69..ddd9b927fd3d5d781e0c00345767ea92a9982ca8 100644
--- a/src/utils/SkNWayCanvas.cpp
+++ b/src/utils/SkNWayCanvas.cpp
@@ -134,13 +134,6 @@ void SkNWayCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
     this->INHERITED::onClipRegion(deviceRgn, op);
 }
 
-void SkNWayCanvas::clear(SkColor color) {
-    Iter iter(fList);
-    while (iter.next()) {
-        iter->clear(color);
-    }
-}
-
 void SkNWayCanvas::drawPaint(const SkPaint& paint) {
     Iter iter(fList);
     while (iter.next()) {