Add context information to driver and add hooks for plugin management

pkg/analyzer_cli/lib/src/driver.dart

 // Copyright (c) 2015, 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 analyzer_cli.src.driver;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io' as io;
 
@@ skipping 568 matching lines @@
 
     if (options.enableNewAnalysisDriver) {
       PerformanceLog log = new PerformanceLog(null);
       AnalysisDriverScheduler scheduler = new AnalysisDriverScheduler(log);
       analysisDriver = new AnalysisDriver(
           scheduler,
           log,
           resourceProvider,
           analysisDriverMemoryByteStore,
           new FileContentOverlay(),
-          'test',
+          null,
           context.sourceFactory,
           context.analysisOptions);
       analysisDriver.results.listen((_) {});
       analysisDriver.exceptions.listen((_) {});
       scheduler.start();
     } else {
       if (sdkBundle != null) {
         _context.resultProvider =
             new InputPackagesResultProvider(_context, summaryDataStore);
       }
@@ skipping 312 matching lines @@
     for (var package in packages) {
       var packageName = path.basename(package.path);
       var realPath = package.resolveSymbolicLinksSync();
       result[packageName] = [
         PhysicalResourceProvider.INSTANCE.getFolder(realPath)
       ];
     }
     return result;
   }
 }