Revert "Flush AST results for source outside of the analysis roots."

pkg/analyzer/test/src/context/context_test.dart

Index: pkg/analyzer/test/src/context/context_test.dart
diff --git a/pkg/analyzer/test/src/context/context_test.dart b/pkg/analyzer/test/src/context/context_test.dart
index 456d3ed53dcf8c867445b8b377c237e4370efbb5..0634ba10fb445b6132216fb692da6e1b6f5a9914 100644
--- a/pkg/analyzer/test/src/context/context_test.dart
+++ b/pkg/analyzer/test/src/context/context_test.dart
@@ -1122,7 +1122,7 @@ import 'dart:async';
     context.applyChanges(new ChangeSet()..addedSource(source));
     context.resolveCompilationUnit2(source, source);
     // Flush all results units.
-    context.analysisCache.flush((target) => true, (target, result) {
+    context.analysisCache.flush((target, result) {
       if (target.source == source) {
         return RESOLVED_UNIT_RESULTS.contains(result);
       }
@@ -1148,7 +1148,7 @@ main() {}
     context.applyChanges(new ChangeSet()..addedSource(source));
     context.resolveCompilationUnit2(source, source);
     // Flush all results units.
-    context.analysisCache.flush((target) => true, (target, result) {
+    context.analysisCache.flush((target, result) {
       if (target.source == source) {
         if (target.source == source) {
           return RESOLVED_UNIT_RESULTS.contains(result);