Make more use of generated code in analysis server.

pkg/analysis_server/test/edit/assists_test.dart

Index: pkg/analysis_server/test/edit/assists_test.dart
diff --git a/pkg/analysis_server/test/edit/assists_test.dart b/pkg/analysis_server/test/edit/assists_test.dart
index fe6b23031eedfd5b218265726a3c3a76b01e502c..df8fb7203b72bab2fc7c5acd5e90d3cf1a81a338 100644
--- a/pkg/analysis_server/test/edit/assists_test.dart
+++ b/pkg/analysis_server/test/edit/assists_test.dart
@@ -41,7 +41,8 @@ class AssistsTest extends AbstractAnalysisTest {
     changes = sourceChangeList.map((SourceChange sourceChange) {
       Change change = new Change(sourceChange.message);
       sourceChange.edits.forEach((SourceFileEdit sourceFileEdit) {
-        FileEdit fileEdit = new FileEdit(sourceFileEdit.file);
+        SourceFileEdit fileEdit = new SourceFileEdit(sourceFileEdit.file,
+            <SourceEdit>[]);
         change.fileEdits.add(fileEdit);
         fileEdit.edits.addAll(sourceFileEdit.edits);
       });