Extend resolution Scope with ResolutionContext and set it for ResolverVisitor.

pkg/analyzer/test/generated/resolver_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.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 1903 matching lines @@
    * identifier.
    *
    * @param node the expression to be resolved
    * @param enclosingClass the element representing the class enclosing the identifier
    * @return the element to which the expression was resolved
    */
   void _resolveInClass(AstNode node, ClassElement enclosingClass) {
     try {
       Scope outerScope = _visitor.nameScope_J2DAccessor as Scope;
       try {
-        _visitor.enclosingClass_J2DAccessor = enclosingClass;
+        _visitor.enclosingClass = enclosingClass;
         EnclosedScope innerScope = new ClassScope(
             new TypeParameterScope(outerScope, enclosingClass),
             enclosingClass);
         _visitor.nameScope_J2DAccessor = innerScope;
         node.accept(_resolver);
       } finally {
-        _visitor.enclosingClass_J2DAccessor = null;
+        _visitor.enclosingClass = null;
         _visitor.nameScope_J2DAccessor = outerScope;
       }
     } catch (exception) {
       throw new IllegalArgumentException("Could not resolve node", exception);
     }
   }
 
   /**
    * Return the element associated with the given expression after the resolver has resolved the
    * expression.
@@ skipping 11492 matching lines @@
         // check propagated type
         FunctionType propagatedType = node.propagatedType as FunctionType;
         expect(propagatedType.returnType, test.typeProvider.stringType);
       } on AnalysisException catch (e, stackTrace) {
         thrownException[0] = new CaughtException(e, stackTrace);
       }
     }
     return null;
   }
 }