Update dart:async to match the Dart repo.

tool/input_sdk/patch/async_patch.dart

Index: tool/input_sdk/patch/async_patch.dart
diff --git a/tool/input_sdk/patch/async_patch.dart b/tool/input_sdk/patch/async_patch.dart
index eefc637dcc64de2a47110375ef761a2bcd2e7bfd..f5890731da1c2a105ea09b3b49bc0353eabcc57d 100644
--- a/tool/input_sdk/patch/async_patch.dart
+++ b/tool/input_sdk/patch/async_patch.dart
@@ -6,7 +6,8 @@
 
 import 'dart:_js_helper' show
     patch,
-    Primitives;
+    Primitives,
+    convertDartClosureToJS;

[vsm, 2016/05/05 21:23:40]

Note - this is just identity on the first arg in DDC.  You could drop it.

[Bob Nystrom, 2016/05/05 22:03:46]

Done.

 import 'dart:_isolate_helper' show
     IsolateNatives,
     TimerImpl,
@@ -20,14 +21,16 @@ import 'dart:_foreign_helper' show JS;
 class _AsyncRun {
   @patch
   static void _scheduleImmediate(void callback()) {
-    scheduleImmediateClosure(callback);
+    _scheduleImmediateClosure(callback);
   }
 
   // Lazily initialized.
-  static final Function scheduleImmediateClosure =
+  static final Function _scheduleImmediateClosure =
       _initializeScheduleImmediate();
 
   static Function _initializeScheduleImmediate() {
+    // TODO(rnystrom): Not needed by dev_compiler.
+    // requiresPreamble();
     if (JS('', 'self.scheduleImmediate') != null) {
       return _scheduleImmediateJsOverride;
     }
@@ -45,7 +48,8 @@ class _AsyncRun {
         f();
       };
 
-      var observer = JS('', 'new self.MutationObserver(#)', internalCallback);
+      var observer = JS('', 'new self.MutationObserver(#)',
+          convertDartClosureToJS(internalCallback, 1));
       JS('', '#.observe(#, { childList: true })',
           observer, div);
 
@@ -72,7 +76,8 @@ class _AsyncRun {
       callback();
     };
     enterJsAsync();
-    JS('void', 'self.scheduleImmediate(#)', internalCallback);
+    JS('void', 'self.scheduleImmediate(#)',
+       convertDartClosureToJS(internalCallback, 0));
   }
 
   static void _scheduleImmediateWithSetImmediate(void callback()) {
@@ -81,7 +86,8 @@ class _AsyncRun {
       callback();
     };
     enterJsAsync();
-    JS('void', 'self.setImmediate(#)', internalCallback);
+    JS('void', 'self.setImmediate(#)',
+       convertDartClosureToJS(internalCallback, 0));
   }
 
   static void _scheduleImmediateWithTimer(void callback()) {
@@ -116,4 +122,10 @@ class Timer {
   }
 }
 
-bool get _hasDocument => JS('String', 'typeof document') == 'object';
+@patch
+void _rethrow(Object error, StackTrace stackTrace) {
+  // TODO(rnystrom): Not needed by dev_compiler.
+  // error = wrapException(error);
+  JS("void", "#.stack = #", error, stackTrace.toString());
+  JS("void", "throw #", error);
+}