Reland [swarming] Isolate v8 testing.

test/developer_default.isolate

Index: test/developer_default.isolate
diff --git a/test/message/unterminated-arg-list.out b/test/developer_default.isolate
similarity index 60%
copy from test/message/unterminated-arg-list.out
copy to test/developer_default.isolate
index 5be2b3d90c28dffc0382a5463219719ecd7cb887..a22c379c34b2793eea3916a553c0937be1defed0 100644
--- a/test/message/unterminated-arg-list.out
+++ b/test/developer_default.isolate
@@ -1,8 +1,9 @@
 # Copyright 2015 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
-
-*%(basename)s:7: SyntaxError: missing ) after argument list
-}
-^
-SyntaxError: missing ) after argument list
+{
+  'includes': [
+    'default.isolate',
+    'unittests/unittests.isolate',
+  ],
+}