StatisticsLayer was shifting subsequent paints.

Turns out we weren't actually saving and restoring the matrix, so our
combined 180.0 pixel downshift was also affecting all subsequent
paints in the frame.

sky/compositor/statistics_layer.cc

@@ -66,7 +66,7 @@ void StatisticsLayer::Paint(PaintContext::ScopedFrame& frame) {
   using Opt = CompositorOptions::Option;
 
   SkScalar width = has_paint_bounds() ? paint_bounds().width() : 0;
-  SkAutoCanvasRestore save(&frame.canvas(), false);
+  SkAutoCanvasRestore save(&frame.canvas(), true);
 
   VisualizeStopWatch(frame.canvas(), frame.context().frame_time(), width,
                      options_.isEnabled(Opt::VisualizeRasterizerStatistics),