Fix many warnings/errors when building Observatory

runtime/observatory/lib/src/elements/isolate_view.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 isolate_view_element;
 
 import 'dart:async';
 import 'dart:html';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/curly_block.dart';
@@ skipping 116 matching lines @@
   detached() {
     super.detached();
     _r.disable(notify: true);
     children = [];
     _subscription.cancel();
   }
 
   void render() {
     final uptime = new DateTime.now().difference(_isolate.startTime);
     final libraries = _isolate.libraries.toList();
-    final List<Thread> threads = _isolate.threads;
+    final List<M.Thread> threads = _isolate.threads;
     children = [
       navBar([
         new NavTopMenuElement(queue: _r.queue),
         new NavVMMenuElement(_vm, _events, queue: _r.queue),
         new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
         new NavRefreshElement(label: 'Reload Source', queue: _r.queue)
           ..onRefresh.listen((e) async {
             e.element.disabled = true;
             await _isolates.reloadSources(_isolate);
             _r.dirty();
@@ skipping 207 matching lines @@
                         _isolate, _rootScript, _scripts, _instances, _events,
                         queue: _r.queue)
                   ]
                 : const [],
           new HRElement(),
           new ViewFooterElement(queue: _r.queue)
         ]
     ];
   }
 
-  DivElement _populateThreadInfo(Thread t) {
+  DivElement _populateThreadInfo(M.Thread t) {
     int index = 0;
     return new DivElement()
       ..classes = ['indent']
       ..children = [
         new SpanElement()..text = '${t.id} ',
         new CurlyBlockElement(queue: _r.queue)
           ..content = [
             new DivElement()
               ..classes = ['indent']
               ..text = 'kind ${t.kindString}',
@@ skipping 19 matching lines @@
       _function = await _functions.get(_isolate, frame.function.id);
     }
     if (_isolate.rootLibrary != null) {
       final rootLibrary =
           await _libraries.get(_isolate, _isolate.rootLibrary.id);
       _rootScript = rootLibrary.rootScript;
     }
     _r.dirty();
   }
 }