Move some of analyzer's code generation utilities into front_end.

pkg/analysis_server/tool/spec/codegen_java_types.dart

Index: pkg/analysis_server/tool/spec/codegen_java_types.dart
diff --git a/pkg/analysis_server/tool/spec/codegen_java_types.dart b/pkg/analysis_server/tool/spec/codegen_java_types.dart
index 02697d66d4447909674a9203378098195d0ac703..3ab4fb8255bf041d2ca54b0130ed64231e7bbdd6 100644
--- a/pkg/analysis_server/tool/spec/codegen_java_types.dart
+++ b/pkg/analysis_server/tool/spec/codegen_java_types.dart
@@ -8,6 +8,7 @@
 library java.generator.types;
 
 import 'package:analyzer/src/codegen/tools.dart';
+import 'package:front_end/src/codegen/tools.dart';
 import 'package:html/dom.dart' as dom;
 
 import 'api.dart';
@@ -48,7 +49,9 @@ const Map<String, String> _extraMethodsOnElement = const {
 /**
  * Type references in the spec that are named something else in Java.
  */
-const Map<String, String> _typeRenames = const {'Override': 'OverrideMember',};
+const Map<String, String> _typeRenames = const {
+  'Override': 'OverrideMember',
+};
 
 final String pathToGenTypes = 'tool/spec/generated/java/types';