DM: dump a zero-results .json file right at startup.
This way, if DM runs, the file will be there, even if it crashes before the
first time we'd ordinarily write out the file (currently, any time
the number of tasks remaining to do becomes evenly divisible by 500).
BUG=skia:4839
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1626493002
Review URL: https://codereview.chromium.org/1626493002
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 25a1263..2f45c61 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1080,6 +1080,7 @@
int dm_main();
int dm_main() {
SetupCrashHandler();
+ JsonWriter::DumpJson(); // It's handy for the bots to assume this is ~never missing.
SkAutoGraphics ag;
SkTaskGroup::Enabler enabled(FLAGS_threads);
gCreateTypefaceDelegate = &create_from_name;