add skotty-dir slide

Shows a directory of skotties in a grid

Bug: skia:
Change-Id: I96b0700d8809c94a394cf517222123967afb20dc
Reviewed-on: https://skia-review.googlesource.com/91407
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index 68f8a8d..59d5e50 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -486,6 +486,8 @@
 
     // JSONs
     for (const auto& json : FLAGS_jsons) {
+        fSlides.push_back(sk_make_sp<SkottySlide2>(json));
+
         SkOSFile::Iter it(json.c_str(), ".json");
         SkString jsonName;
         while (it.next(&jsonName)) {