DM: add uninteresting hashes FYI

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1663223002

Review URL: https://codereview.chromium.org/1663223002

1 files changed, 2 insertions, 0 deletions

diff --git a/dm/DM.cpp b/dm/DM.cpp
index e5a6e4d196..cdd53c6be4 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -188,6 +188,8 @@ static void gather_uninteresting_hashes() {
         for (const SkString& hash : hashes) {
             gUninterestingHashes.add(hash);
         }
+        SkDebugf("FYI: loaded %d distinct uninteresting hashes from %d lines\n",
+                 gUninterestingHashes.count(), hashes.count());
     }
 }