Big merge from experimental to bleeding edge.

sdk/lib/isolate/base.dart

Index: sdk/lib/isolate/base.dart
diff --git a/sdk/lib/isolate/base.dart b/sdk/lib/isolate/base.dart
index 93f8efee0bd3949b966249b045be6d9b3b12e7f0..c6c36e016f68bcb721a4669c31de0c8e14e2a5da 100644
--- a/sdk/lib/isolate/base.dart
+++ b/sdk/lib/isolate/base.dart
@@ -16,7 +16,7 @@ class IsolateSpawnException implements Exception {
  * the first communication between isolates (see [spawnFunction] and
  * [spawnUri]).
  */
-external ReceivePort get port;
+ReceivePort get port => _Isolate.port;
 
 /**
  * Creates and spawns an isolate that shares the same code as the current
@@ -33,9 +33,10 @@ external ReceivePort get port;
  *
  * See comments at the top of this library for more details.
  */
-// Note this feature is not yet available in the dartvm.
-external SendPort spawnFunction(void topLevelFunction(),
-    [bool UnhandledExceptionCallback(IsolateUnhandledException e)]);
+SendPort spawnFunction(void topLevelFunction(),
+    [bool UnhandledExceptionCallback(IsolateUnhandledException e)])
+    => _Isolate.spawnFunction(topLevelFunction, UnhandledExceptionCallback);
+
 /**
  * Creates and spawns an isolate whose code is available at [uri].  Like with
  * [spawnFunction], the child isolate will have a default [ReceivePort], and a
@@ -43,7 +44,7 @@ external SendPort spawnFunction(void topLevelFunction(),
  *
  * See comments at the top of this library for more details.
  */
-external SendPort spawnUri(String uri);
+SendPort spawnUri(String uri) => _Isolate.spawnUri(uri);
 
 /**
  * [SendPort]s are created from [ReceivePort]s. Any message sent through
@@ -145,6 +146,16 @@ abstract class SendPortSync {
 
 }
 
+// The VM doesn't support accessing external globals in the same library. We
+// therefore create this wrapper class.
+// TODO(6997): Don't go through static class for external variables.
+abstract class _Isolate {
+  external static ReceivePort get port;
+  external static SendPort spawnFunction(void topLevelFunction(),
+    [bool UnhandledExceptionCallback(IsolateUnhandledException e)]);
+  external static SendPort spawnUri(String uri);
+}
+
 /**
  * Wraps unhandled exceptions thrown during isolate execution. It is
  * used to show both the error message and the stack trace for unhandled