Big merge from experimental to bleeding edge.

sdk/lib/_internal/compiler/implementation/lib/async_patch.dart

Index: sdk/lib/_internal/compiler/implementation/lib/async_patch.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/isolate_patch.dart b/sdk/lib/_internal/compiler/implementation/lib/async_patch.dart
similarity index 59%
copy from sdk/lib/_internal/compiler/implementation/lib/isolate_patch.dart
copy to sdk/lib/_internal/compiler/implementation/lib/async_patch.dart
index cd661b177c6e36fecad20d7693239517edeb1310..a8cddae958d7ed4791d559c9130bb9b88045dd90 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/isolate_patch.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/async_patch.dart
@@ -2,31 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Patch file for the dart:isolate library.
-
-patch ReceivePort get port {
-  if (lazyPort == null) {
-    lazyPort = new ReceivePort();
-  }
-  return lazyPort;
-}
-
-patch SendPort spawnFunction(void topLevelFunction(),
-    [bool UnhandledExceptionCallback(IsolateUnhandledException e)]) {
-  return IsolateNatives.spawnFunction(topLevelFunction);
-}
-
-patch SendPort spawnUri(String uri) {
-  return IsolateNatives.spawn(null, uri, false);
-}
-
-
-/** Default factory for receive ports. */
-patch class ReceivePort {
-  patch factory ReceivePort() {
-    return new ReceivePortImpl();
-  }
-}
+// Patch file for the dart:async library.
 
 patch class Timer {
   patch factory Timer(int milliseconds, void callback(Timer timer)) {