Generate names for anonymous Java classes using enclosing classes and members.

pkg/analyzer/lib/src/generated/error.dart

Index: pkg/analyzer/lib/src/generated/error.dart
diff --git a/pkg/analyzer/lib/src/generated/error.dart b/pkg/analyzer/lib/src/generated/error.dart
index 134d92e0db5d1f49c54743963d7b2579c9fab6a9..696d3a0345756312938391bc9e5cf3f7b98d397d 100644
--- a/pkg/analyzer/lib/src/generated/error.dart
+++ b/pkg/analyzer/lib/src/generated/error.dart
@@ -3236,7 +3236,7 @@ abstract class AnalysisErrorListener {
   /**
    * An error listener that ignores errors that are reported to it.
    */
-  static final AnalysisErrorListener NULL_LISTENER = new AnalysisErrorListener_6();
+  static final AnalysisErrorListener NULL_LISTENER = new AnalysisErrorListener_NULL_LISTENER();
 
   /**
    * This method is invoked when an error has been found by the analysis engine.
@@ -3246,7 +3246,7 @@ abstract class AnalysisErrorListener {
   void onError(AnalysisError error);
 }
 
-class AnalysisErrorListener_6 implements AnalysisErrorListener {
+class AnalysisErrorListener_NULL_LISTENER implements AnalysisErrorListener {
   void onError(AnalysisError event) {
   }
 }