Big merge from experimental to bleeding edge.

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

Index: sdk/lib/_internal/compiler/implementation/apiimpl.dart
diff --git a/sdk/lib/_internal/compiler/implementation/apiimpl.dart b/sdk/lib/_internal/compiler/implementation/apiimpl.dart
index 73c4f28ff29f76946881befcb0033c596a32cd12..f6434a018f9b6571bcb6a391eddf68fcf186f660 100644
--- a/sdk/lib/_internal/compiler/implementation/apiimpl.dart
+++ b/sdk/lib/_internal/compiler/implementation/apiimpl.dart
@@ -5,6 +5,7 @@
 library leg_apiimpl;
 
 import 'dart:uri';
+import 'dart:async';
 
 import '../compiler.dart' as api;
 import 'dart2jslib.dart' as leg;
@@ -107,7 +108,7 @@ class Compiler extends leg.Compiler {
       try {
         // TODO(ahe): We expect the future to be complete and call value
         // directly. In effect, we don't support truly asynchronous API.
-        text = provider(translated).value;
+        text = deprecatedFutureValue(provider(translated));
       } catch (exception) {
         if (node != null) {
           cancel("$exception", node: node);