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

1 files changed, 1 insertions, 0 deletions

diff --git a/dm/DM.cpp b/dm/DM.cpp
index eb61fd786b..78b403b8d0 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -853,6 +853,7 @@ static Sink* create_via(const SkString& tag, Sink* wrapped) {
     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);