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

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

Index: pkg/analyzer/lib/src/summary/summary_sdk.dart
diff --git a/pkg/analyzer/lib/src/summary/summary_sdk.dart b/pkg/analyzer/lib/src/summary/summary_sdk.dart
index 987a1878564dcdbaa11e2f899f790b40be170d4a..7003905c67bd26f79040a0d66d6ba7f07bd8f747 100644
--- a/pkg/analyzer/lib/src/summary/summary_sdk.dart
+++ b/pkg/analyzer/lib/src/summary/summary_sdk.dart
@@ -20,6 +20,7 @@ import 'package:analyzer/src/summary/package_bundle_reader.dart';
 import 'package:analyzer/src/summary/resynthesize.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/task/model.dart' show ResultDescriptor, TargetedResult;
+import 'package:analyzer/file_system/file_system.dart' show ResourceProvider;
 
 class SdkSummaryResultProvider extends ResynthesizerResultProvider {
   final SummaryTypeProvider typeProvider = new SummaryTypeProvider();
@@ -106,14 +107,20 @@ class SummaryBasedDartSdk implements DartSdk {
   SummaryDataStore _dataStore;
   InSummaryPackageUriResolver _uriResolver;
   PackageBundle _bundle;
+  ResourceProvider resourceProvider;
 
   /**
    * The [AnalysisContext] which is used for all of the sources in this sdk.
    */
   InternalAnalysisContext _analysisContext;
 
-  SummaryBasedDartSdk(String summaryPath, this.strongMode) {
-    _dataStore = new SummaryDataStore(<String>[summaryPath]);
+  SummaryBasedDartSdk(String summaryPath, this.strongMode,

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

Rather than have one constructor with two different behaviors (and two different
sets of arguments it pays attention to), leave this constructor as is, and just
make a new constructor, e.g.:

SummaryBasedDartSdk.fromBundle(this.strongMode, PackageBundle bundle,
this.resourceProvider) {
  _dataStore = new SummaryDataStore([]);
  _dataStore.addBundle(bundle);
  _uriResolver = ...;
  _bundle = bundle;
}

That way there's no danger of callers accidentally mixing and matching the two
calling styles and getting nonsense results.

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

Done.

+      [PackageBundle bundle, this.resourceProvider]) {
+    if (summaryPath != null) {
+      _dataStore = new SummaryDataStore(<String>[summaryPath]);
+    } else {
+      _dataStore = new SummaryDataStore([], bundle);
+    }
     _uriResolver = new InSummaryPackageUriResolver(_dataStore);
     _bundle = _dataStore.bundles.single;
   }
@@ -129,7 +136,8 @@ class SummaryBasedDartSdk implements DartSdk {
       AnalysisOptionsImpl analysisOptions = new AnalysisOptionsImpl()
         ..strongMode = strongMode;
       _analysisContext = new SdkAnalysisContext(analysisOptions);
-      SourceFactory factory = new SourceFactory([new DartUriResolver(this)]);
+      SourceFactory factory = new SourceFactory(
+          [new DartUriResolver(this)], null, resourceProvider);
       _analysisContext.sourceFactory = factory;
       _analysisContext.resultProvider =
           new SdkSummaryResultProvider(_analysisContext, _bundle, strongMode);