Add Skottie fuzzer (via json input)

Bug: skia:
Change-Id: I97543b73755fca73f2ad014113ae8cd2c9227cf3
Reviewed-on: https://skia-review.googlesource.com/125820
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index b117dd2..b847032 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1838,6 +1838,7 @@
       "fuzz/oss_fuzz/FuzzPathDeserialize.cpp",
       "fuzz/oss_fuzz/FuzzRegionDeserialize.cpp",
       "fuzz/oss_fuzz/FuzzRegionSetPath.cpp",
+      "fuzz/oss_fuzz/FuzzSkottieJSON.cpp",
       "fuzz/oss_fuzz/FuzzTextBlobDeserialize.cpp",
       "tools/UrlDataManager.cpp",
       "tools/debugger/SkDebugCanvas.cpp",
@@ -1846,6 +1847,7 @@
       "tools/picture_utils.cpp",
     ]
     deps = [
+      ":experimental_skottie",
       ":flags",
       ":gpu_tool_utils",
       ":skia",