Consolidate analyzer dependencies.

pkg/front_end/lib/src/fasta/analyzer/analyzer_loader.dart

+// Copyright (c) 2017, 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 fasta.analyzer_loader;
+
+import 'package:kernel/ast.dart' show Program;
+
+import '../builder/builder.dart' show LibraryBuilder;
+
+import '../target_implementation.dart' show TargetImplementation;
+
+import '../source/source_loader.dart' show SourceLoader;
+
+import 'element_store.dart' show ElementStore;
+
+import 'analyzer_diet_listener.dart' show AnalyzerDietListener;
+
+class AnalyzerLoader<L> extends SourceLoader<L> {
+  ElementStore elementStore;
+
+  AnalyzerLoader(TargetImplementation target) : super(target);
+
+  @override
+  void computeHierarchy(Program program) {
+    elementStore = new ElementStore(coreLibrary, builders);
+    ticker.logMs("Built analyzer element model.");
+  }
+
+  @override
+  AnalyzerDietListener createDietListener(LibraryBuilder library) {
+    return new AnalyzerDietListener(library, elementStore);
+  }
+}