V8 Buildbot: Add the ability to disable tests in nosnap mode.

scripts/slave/recipe_modules/v8/config.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from slave.recipe_config import config_item_context, ConfigGroup
 from slave.recipe_config import Set, Single, Static
 
 
 def BaseConfig(**_kwargs):
   shard_count = _kwargs.get('SHARD_COUNT', 1)
@@ skipping 27 matching lines @@
 def gc_stress(c):
   c.testing.test_args.add('--gc-stress')
 
 
 @config_ctx()
 def isolates(c):
   c.testing.test_args.add('--isolates=on')
 
 
 @config_ctx()
+def no_snapshot(c):
+  c.testing.test_args.add('--no-snap')
+
+
+@config_ctx()
 def nosse2(c):
   c.testing.test_args.add('--shell_flags="--noenable-sse2"')
 
 
 @config_ctx()
 def nosse3(c):
   c.testing.test_args.add('--shell_flags="--noenable-sse3"')
 
 
 @config_ctx()
 def nosse4(c):
   c.testing.test_args.add('--shell_flags="--noenable-sse4-1"')
 
 
 @config_ctx()
 def novfp3(c):
   c.testing.test_args.add('shell_flags="--noenable-vfp3"')
 
 
 @config_ctx()
 def trybot_flavor(c):
   c.testing.flaky_step = False
   c.testing.test_args.add('--quickcheck')