deferred canvas
tries to eliminate unneeded clipRects and concats (and their associated save/restores).
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2120333002
Review-Url: https://codereview.chromium.org/2120333002
diff --git a/dm/DM.cpp b/dm/DM.cpp
index eb61fd7..78b403b 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -853,6 +853,7 @@
VIA("pic", ViaPicture, wrapped);
VIA("2ndpic", ViaSecondPicture, wrapped);
VIA("sp", ViaSingletonPictures, wrapped);
+ VIA("defer", ViaDefer, wrapped);
VIA("tiles", ViaTiles, 256, 256, nullptr, wrapped);
VIA("tiles_rt", ViaTiles, 256, 256, new SkRTreeFactory, wrapped);