Start unraveling circularities between analyzer and front_end/kernel.

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

 // Copyright (c) 2016, 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;
 
 import 'package:analyzer/analyzer.dart' show AstNode;
 
 import 'package:analyzer/dart/element/element.dart' show LocalElement;
 
-import 'package:kernel/analyzer/ast_from_analyzer.dart' show ExpressionScope;
+import 'package:analyzer/src/kernel/ast_from_analyzer.dart' show ExpressionScope;
 
 import 'package:kernel/ast.dart' show Library, TreeNode;
 
-import '../builder/scope.dart' show Scope;
+import 'package:front_end/src/fasta/builder/scope.dart' show Scope;
 
-import '../kernel/kernel_builder.dart'
+import 'package:front_end/src/fasta/kernel/kernel_builder.dart'
     show Builder, KernelFormalParameterBuilder;
 
 import 'element_store.dart' show ElementStore;
 
 export 'ast_builder.dart' show AstBuilder;
 
 export 'element_store.dart' show ElementStore;
 
 TreeNode toKernel(
     AstNode node, ElementStore store, Library library, Scope scope) {
   ExpressionScope expressionScope = new ExpressionScope(store, library);
   scope.local.forEach((String name, Builder builder) {
     if (builder is KernelFormalParameterBuilder) {
       LocalElement local = store[builder];
       assert(local != null);
       assert(builder.declaration != null);
       expressionScope.localVariables[local] = builder.declaration;
     }
   });
   return expressionScope.buildStatement(node);
 }