Port Try Dart! to SDK 1.0.

dart/site/try/compiler_isolate.dart

 // Copyright (c) 2013, 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 compiler_isolate;
 
 import 'dart:async';
 import 'dart:html';
 import 'dart:isolate';
-import 'dart:uri';
-import 'dart:json' show parse;
+import 'dart:convert' show JSON;
 
-import '../sdk/lib/_internal/compiler/compiler.dart' as compiler;
+import '../../sdk/lib/_internal/compiler/compiler.dart' as compiler;
 
 const bool THROW_ON_ERROR = false;
 
 final cachedSources = new Map<Uri, String>();
 
 Uri sdkLocation;
 List options = [];
 
 compile(source, SendPort replyTo) {
   if (sdkLocation == null) {
     // The first message received gives us the URI of this web app.
-    if (source.endsWith('/sdk.dart')) {
+    if (source.endsWith('/sdk.json')) {
       var request = new HttpRequest();
       request.open('GET', source, async: false);
       request.send(null);
+      if (request.status != 200) {
+        throw 'SDK not found at $source';
+      }
       sdkLocation = Uri.parse('sdk:/sdk/');
-      parse(request.responseText).forEach((file, content) {
-        cachedSources[Uri.parse('sdk:/$file')] = content;
+      JSON.decode(request.responseText).forEach((file, content) {
+        cachedSources[Uri.parse(file)] = content;
       });
     } else {
       sdkLocation = Uri.parse(source);
     }
     replyTo.send(null);
     return;
   }
   if (source is List) {
     String messageType = (source.length > 0) ? source[0] : null;
     var data = (source.length > 1) ? source[1] : null;
@@ skipping 30 matching lines @@
                String message, compiler.Diagnostic kind) {
     replyTo.send(['diagnostic', { 'uri': '$uri',
                                   'begin': begin,
                                   'end': end,
                                   'message': message,
                                   'kind': kind.name }]);
     if (THROW_ON_ERROR && kind == compiler.Diagnostic.ERROR) {
       throw new Exception('Throw on error');
     }
   }
-  compiler.compile(new Uri('memory:/main.dart'),
+  compiler.compile(Uri.parse('memory:/main.dart'),
                    sdkLocation,
                    null,
                    inputProvider,
                    handler,
                    options).then((js) {
     try {
       if (js == null) {
         if (!options.contains('--analyze-only')) replyTo.send('failed');
       } else {
         var url;
@@ skipping 16 matching lines @@
         } else {
           replyTo.send(['code', js]);
         }
       }
     } catch (e, trace) {
       replyTo.send(['crash', '$e, $trace']);
     }
     replyTo.send('done');
   });
 }