Fix memory leak in incremental resolver

pkg/analyzer/lib/src/context/context.dart

 // Copyright (c) 2015, 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 analyzer.src.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1857 matching lines @@
       CompilationUnit oldUnit =
           getResolvedCompilationUnit2(unitSource, librarySource);
       if (oldUnit == null) {
         return false;
       }
       // do resolution
       Stopwatch perfCounter = new Stopwatch()..start();
       PoorMansIncrementalResolver resolver = new PoorMansIncrementalResolver(
           typeProvider,
           unitSource,
+          _cache,
           sourceEntry,
           unitEntry,
           oldUnit,
           analysisOptions.incrementalApi);
       bool success = resolver.resolve(newCode);
       AnalysisEngine.instance.instrumentationService.logPerformance(
           AnalysisPerformanceKind.INCREMENTAL,
           perfCounter,
           'success=$success,context_id=$_id,code_length=${newCode.length}');
       if (!success) {
@@ skipping 217 matching lines @@
     }
     DartSdk sdk = factory.dartSdk;
     if (sdk == null) {
       throw new IllegalArgumentException(
           "The source factory for an SDK analysis context must have a DartUriResolver");
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }