Share LibrarySpecificUnits when possible

pkg/analyzer/lib/src/task/driver.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.task.driver;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/src/context/cache.dart';
@@ skipping 705 matching lines @@
           }
           throw new AnalysisException(message);
         } catch (exception, stackTrace) {
           this.exception = new CaughtException(exception, stackTrace);
           AnalysisEngine.instance.logger
               .logError('Task failed: $this', this.exception);
         }
         return null;
       }
 
+      inputTarget = context.canonicalizeTarget(inputTarget);
       inputTargetedResults.add(new TargetedResult(inputTarget, inputResult));
       CacheEntry inputEntry = context.getCacheEntry(inputTarget);
       CacheState inputState = inputEntry.getState(inputResult);
       if (inputState == CacheState.ERROR) {
         exception = inputEntry.exception;
         return null;
       } else if (inputState == CacheState.IN_PROCESS) {
         //
         // TODO(brianwilkerson) Implement this case.
         //
@@ skipping 136 matching lines @@
   final TaskManager taskManager;
 
   _WorkOrderDependencyWalker(this.taskManager, WorkItem startingNode)
       : super(startingNode);
 
   @override
   WorkItem getNextInput(WorkItem node, List<WorkItem> skipInputs) {
     return node.gatherInputs(taskManager, skipInputs);
   }
 }