Removed io dependencies in analyzer to allow compiler to run in the browser

pkg/analyzer/lib/src/summary/package_bundle_reader.dart

 import 'dart:io' as io;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 256 matching lines @@
   /**
    * Map from the URI of a library to the linked summary of that library.
    */
   final Map<String, LinkedLibrary> linkedMap = <String, LinkedLibrary>{};
 
   /**
    * Map from the URI of a library to the summary path that contained it.
    */
   final Map<String, String> uriToSummaryPath = <String, String>{};
 
-  SummaryDataStore(Iterable<String> summaryPaths) {
+  SummaryDataStore(Iterable<String> summaryPaths, [PackageBundle bundle]) {

[Paul Berry, 2016/07/26 21:16:22]

These changes shouldn't be necessary--the caller should just call addBundle (see
suggestion below).

[priscillalee, 2016/07/26 21:32:48]

Done.

     summaryPaths.forEach(_fillMaps);
+    if (bundle != null) addBundle('dart_sdk.sum', bundle);
   }
 
   /**
    * Add the given [bundle] loaded from the file with the given [path].
    */
   void addBundle(String path, PackageBundle bundle) {
     bundles.add(bundle);
     for (int i = 0; i < bundle.unlinkedUnitUris.length; i++) {
       String uri = bundle.unlinkedUnitUris[i];
       uriToSummaryPath[uri] = path;
@@ skipping 51 matching lines @@
  * also provides [summaryPath].
  */
 class _InSummaryFallbackSource extends FileBasedSource
     implements InSummarySource {
   @override
   final String summaryPath;
 
   _InSummaryFallbackSource(JavaFile file, Uri uri, this.summaryPath)
       : super(file, uri);
 }