Move embedder locator and convert context builder to use the new API

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index 1d0871dac36aacc13ba470b96cf54a54967d4496..92c7007f28cb0cd0f376822be1999f1e641c5bd7 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -9,8 +9,8 @@ import 'dart:async';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
-import 'package:analyzer/source/embedder.dart';
 import 'package:analyzer/src/cancelable_future.dart';
+import 'package:analyzer/src/context/builder.dart' show EmbedderYamlLocator;
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/context/source.dart';
@@ -225,6 +225,12 @@ class TestAnalysisContext implements InternalAnalysisContext {
   }
 
   @override
+  CacheConsistencyValidator get cacheConsistencyValidator {
+    fail("Unexpected invocation of cacheConsistencyValidator");
+    return null;
+  }
+
+  @override
   set contentCache(ContentCache value) {
     fail("Unexpected invocation of setContentCache");
   }
@@ -705,10 +711,4 @@ class TestAnalysisContext implements InternalAnalysisContext {
   void visitContentCache(ContentCacheVisitor visitor) {
     fail("Unexpected invocation of visitContentCache");
   }
-
-  @override
-  CacheConsistencyValidator get cacheConsistencyValidator {
-    fail("Unexpected invocation of cacheConsistencyValidator");
-    return null;
-  }
 }