Skip msaa4 on Tegra 2 and 3.

This will fix the N7 and Xoom bots.

TBR=borenet@google.com

BUG=skia:

Review URL: https://codereview.chromium.org/1099943002

tools/dm_flags.json

@@ -156,7 +156,6 @@
     "565", 
     "8888", 
     "gpu", 
-    "msaa4", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
@@ -606,7 +605,6 @@
     "565", 
     "8888", 
     "gpu", 
-    "msaa4", 
     "--blacklist", 
     "gpu", 
     "_", 

tools/dm_flags.py

@@ -38,9 +38,11 @@ def get_args(bot):
       configs.append('nvprmsaa16')
 
   # The S4 crashes and the NP produces a long error stream when we run with
-  # MSAA.
+  # MSAA.  The Tegra2 and Tegra3 just don't support it.
   if ('GalaxyS4'    not in bot and
-      'NexusPlayer' not in bot):
+      'NexusPlayer' not in bot and
+      'Tegra2'      not in bot and
+      'Tegra3'      not in bot):
     if 'Android' in bot:
       configs.append('msaa4')
     else: