Add _embedder.yaml support to analyzer and analysis_server

pkg/analyzer/test/generated/engine_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library engine.engine_test;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/source/embedder.dart';
 import 'package:analyzer/src/cancelable_future.dart';
 import 'package:analyzer/src/context/cache.dart' show CacheEntry;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/html.dart' as ht;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
@@ skipping 5663 matching lines @@
     return null;
   }
 
   @override
   AnalysisOptions get analysisOptions {
     fail("Unexpected invocation of getAnalysisOptions");
     return null;
   }
 
   @override
+  EmbedderYamlLocator get embedderYamlLocator {
+    fail("Unexpected invocation of get embedderYamlLocator");
+    return null;
+  }
+
+  @override
   void set analysisOptions(AnalysisOptions options) {
     fail("Unexpected invocation of setAnalysisOptions");
   }
 
   @override
   void set analysisPriorityOrder(List<Source> sources) {
     fail("Unexpected invocation of setAnalysisPriorityOrder");
   }
 
   @override
@@ skipping 1343 matching lines @@
   @override
   bool exists() => true;
 }
 
 class _UniversalCachePartitionTest_test_setMaxCacheSize
     implements CacheRetentionPolicy {
   @override
   RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) =>
       RetentionPriority.LOW;
 }