Blacklist testimgari.jpg on CG

Bug: skia:
Change-Id: I2c471d18f29bb6d0e8ac4a4d0afa1815788bb121
Reviewed-on: https://skia-review.googlesource.com/14825
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
diff --git a/infra/bots/recipes/test.py b/infra/bots/recipes/test.py
index 97ec7b9..4ff50c0 100644
--- a/infra/bots/recipes/test.py
+++ b/infra/bots/recipes/test.py
@@ -218,7 +218,7 @@
     blacklist('_ image gen_platf inc13.png')
     blacklist('_ image gen_platf inc14.png')
 
-  # WIC fails on questionable bmps and arithmetic jpegs
+  # WIC fails on questionable bmps
   if 'Win' in bot:
     blacklist('_ image gen_platf rle8-height-negative.bmp')
     blacklist('_ image gen_platf rle4-height-negative.bmp')
@@ -231,11 +231,14 @@
     blacklist('_ image gen_platf 4bpp-pixeldata-cropped.bmp')
     blacklist('_ image gen_platf 32bpp-pixeldata-cropped.bmp')
     blacklist('_ image gen_platf 24bpp-pixeldata-cropped.bmp')
-    blacklist('_ image gen_platf testimgari.jpg')
     if 'x86_64' in bot and 'CPU' in bot:
       # This GM triggers a SkSmallAllocator assert.
       blacklist('_ gm _ composeshader_bitmap')
 
+  # WIC and CG fail on arithmetic jpegs
+  if 'Win' in bot or 'Mac' in bot:
+    blacklist('_ image gen_platf testimgari.jpg')
+
   if 'Android' in bot or 'iOS' in bot:
     # This test crashes the N9 (perhaps because of large malloc/frees). It also
     # is fairly slow and not platform-specific. So we just disable it on all of