Omit multipicturedraw tests for Valgrind_PreAbandonGpuContext bot.

Bug: skia:6575
Change-Id: Ie937962e6a4f2dd989efca8ad94d35ad058bc87c
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/20226
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
diff --git a/infra/bots/recipes/test.py b/infra/bots/recipes/test.py
index 2c26ad9..049eb26 100644
--- a/infra/bots/recipes/test.py
+++ b/infra/bots/recipes/test.py
@@ -389,6 +389,10 @@
   if 'Valgrind' in bot: # skia:3021
     match.append('~Threaded')
 
+  if 'Valgrind' in bot and 'PreAbandonGpuContext' in bot:
+    # skia:6575
+    match.append('~multipicturedraw_')
+
   if 'CommandBuffer' in bot:
     # https://crbug.com/697030
     match.append('~HalfFloatAlphaTextureTest')