Blacklist tiles_rt-gpu gm imagefilterscropped on GalaxyS4

tools/dm_flags.py

Index: tools/dm_flags.py
diff --git a/tools/dm_flags.py b/tools/dm_flags.py
index b4a28db46d1f0f25bc8aa189a7cec5e920d3f1d7..817c38b319c68ca1b3c651e810b99bf0abdafb4f 100755
--- a/tools/dm_flags.py
+++ b/tools/dm_flags.py
@@ -134,6 +134,10 @@ def get_args(bot):
     blacklist.extend('gpu image subset _ msaa image subset _'.split(' '))
     blacklist.extend('msaa16 gm _ tilemodesProcess'.split(' '))
 
+  if 'GalaxyS4' in bot:
+    # This occasionally runs forever. skia:3802
+    blacklist.extend('tiles_rt-gpu gm _ imagefilterscropped'.split(' '))
+
   if blacklist:
     args.append('--blacklist')
     args.extend(blacklist)