isolates refactor: this change introduces 'dart:isolate' as a library. This is a

tests/isolate/isolate.status

Index: tests/isolate/isolate.status
diff --git a/tests/isolate/isolate.status b/tests/isolate/isolate.status
index e64b95be1571477b7725ed6c98dc9d8d69fbe512..1f931b8d9308045bcf0892bc7ba61aa271a304c9 100644
--- a/tests/isolate/isolate.status
+++ b/tests/isolate/isolate.status
@@ -8,10 +8,11 @@ prefix isolate
 Isolate2NegativeTest: Skip  # Need to resolve correct behaviour.
 
 [ $component == dartium || $component == vm ]
-SerializationTest: Skip  # DartC test (uses coreimpl).
+SerializationTest: Skip  # tests frog-specific serialization code
 *APIv2*: Skip # new api for isolates not implemented in the VM yet.
 
 [ $component == dartc ]
+SerializationTest: Skip  # tests frog-specific serialization code
 IsolateNegativeTest: Fail    # status change with --check-only
 Isolate2NegativeTest: Fail   # status change with --check-only
 *APIv2*: Skip # new api for isolates not in corelib yet.
@@ -47,6 +48,11 @@ NestedSpawnTest: Skip
 IsolateNegativeTest: Skip
 Isolate2NegativeTest: Skip
 
+[ $component == frogsh ]
+# This test seems to be confusing the compiler who thinks that two instances of
+# the same type are not the same.
+SerializationTest: Skip
+
 [ $component == webdriver && $browser == safari ]
 CrossIsolateMessageTest: Skip      # Depends on 32/64 bit Safari. See Issue 1120
 MixedTest: Pass,Fail               # Depends on 32/64 bit Safari. See Issue 1120