Partial implementation of the 'setAnalysisRoots' API.

pkg/analysis_server/lib/src/resource.dart

Index: pkg/analysis_server/lib/src/resource.dart
diff --git a/pkg/analysis_server/lib/src/resource.dart b/pkg/analysis_server/lib/src/resource.dart
index 2db8d615b1152d1cafda3c36bed5ea685c1d84f2..e3cba4547442dbbad73241f4252f4ad4e2c69dfc 100644
--- a/pkg/analysis_server/lib/src/resource.dart
+++ b/pkg/analysis_server/lib/src/resource.dart
@@ -158,6 +158,14 @@ class _MemoryFileSource implements Source {
   _MemoryFileSource(this._file, this.uriKind);
 
   @override
+  bool operator ==(other) {
+    if (other is _MemoryFileSource) {
+      return other._file == _file;
+    }
+    return false;
+  }
+
+  @override
   TimestampedData<String> get contents {
     return new TimestampedData<String>(modificationStamp, _file._content);
   }
@@ -174,6 +182,9 @@ class _MemoryFileSource implements Source {
   String get fullName => _file.fullName;
 
   @override
+  int get hashCode => _file.hashCode;
+
+  @override
   bool get isInSystemLibrary => false;
 
   @override