Big merge from experimental to bleeding edge.

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 library leg_apiimpl;
 
 import 'dart:uri';
+import 'dart:async';
 
 import '../compiler.dart' as api;
 import 'dart2jslib.dart' as leg;
 import 'tree/tree.dart' as tree;
 import 'elements/elements.dart' as elements;
 import 'ssa/tracer.dart' as ssa;
 import '../../libraries.dart';
 import 'source_file.dart';
 
 class Compiler extends leg.Compiler {
@@ skipping 82 matching lines @@
   }
 
   leg.Script readScript(Uri uri, [tree.Node node]) {
     return fileReadingTask.measure(() {
       if (uri.scheme == 'dart') uri = translateDartUri(uri, node);
       var translated = translateUri(uri, node);
       String text = "";
       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("$exception", node: node);
         } else {
           reportDiagnostic(null, "$exception", api.Diagnostic.ERROR);
           throw new leg.CompilerCancelledException("$exception");
         }
       }
       SourceFile sourceFile = new SourceFile(translated.toString(), text);
       return new leg.Script(uri, sourceFile);
@@ skipping 62 matching lines @@
       handler(translateUri(span.uri, null), span.begin, span.end,
               message, kind);
     }
   }
 
   bool get isMockCompilation {
     return mockableLibraryUsed
       && (options.indexOf('--allow-mock-compilation') != -1);
   }
 }