Simplify PictureLayer::Paint. (#2962)

flow/layers/picture_layer.cc

@@ -23,15 +23,15 @@ void PictureLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
 void PictureLayer::Paint(PaintContext& context) {
   FTL_DCHECK(picture_);
 
+  TRACE_EVENT1("flutter", "PictureLayer::Paint", "image",
+               image_ ? "prerolled" : "normal");
+
+  SkAutoCanvasRestore save(&context.canvas, true);
+  context.canvas.translate(offset_.x(), offset_.y());
+
   if (image_) {
-    TRACE_EVENT1("flutter", "PictureLayer::Paint", "image", "prerolled");
-    SkRect rect = picture_->cullRect().makeOffset(offset_.x(), offset_.y());
-    context.canvas.drawImageRect(image_.get(), rect, nullptr,
-                                 SkCanvas::kFast_SrcRectConstraint);
+    context.canvas.drawImage(image_.get(), 0, 0);
   } else {
-    TRACE_EVENT1("flutter", "PictureLayer::Paint", "image", "normal");
-    SkAutoCanvasRestore save(&context.canvas, true);
-    context.canvas.translate(offset_.x(), offset_.y());
     context.canvas.drawPicture(picture_.get());
   }
 }