Ensure that RESOLVED_UNITx ready once for every library.

pkg/analyzer/lib/src/task/driver.dart

Index: pkg/analyzer/lib/src/task/driver.dart
diff --git a/pkg/analyzer/lib/src/task/driver.dart b/pkg/analyzer/lib/src/task/driver.dart
index 8ccbbdd8c2940fdfb6191d068d30ff1febc58c9c..5348380975577b0bd9bf5a9939df2c687601e905 100644
--- a/pkg/analyzer/lib/src/task/driver.dart
+++ b/pkg/analyzer/lib/src/task/driver.dart
@@ -275,6 +275,9 @@ class AnalysisDriver {
         // TODO(brianwilkerson) We could check here that a value was produced
         // and throw an exception if not (unless we want to allow null values).
         entry.setValue(result, outputs[result], dependedOn);
+//        if (dependedOn.length > 800) {
+//          print('[${dependedOn.length}] $result or $target dependsOn: $dependedOn');
+//        }
       }
       outputs.forEach((ResultDescriptor descriptor, value) {
         StreamController<ComputedResult> controller =