Fixes for import/export directive resolution and tasks graph.

pkg/analyzer/tool/task_dependency_graph/tasks.dot

 // 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analyzer/tool/task_dependency_graph/generate.dart".
 //
 // To render this graph using Graphviz (www.graphviz.org) use the command:
 // "dot tasks.dot -Tpdf -O".
 digraph G {
   BUILD_DIRECTIVES_ERRORS -> LibraryUnitErrorsTask
   BUILD_DIRECTIVES_ERRORS [shape=box]
   BUILD_LIBRARY_ERRORS -> LibraryUnitErrorsTask
   BUILD_LIBRARY_ERRORS [shape=box]
   BuildCompilationUnitElementTask -> COMPILATION_UNIT_CONSTANTS
   BuildCompilationUnitElementTask -> COMPILATION_UNIT_ELEMENT
   BuildCompilationUnitElementTask -> CREATED_RESOLVED_UNIT1
   BuildCompilationUnitElementTask -> RESOLVED_UNIT1
   BuildDirectiveElementsTask -> BUILD_DIRECTIVES_ERRORS
   BuildDirectiveElementsTask -> LIBRARY_ELEMENT2
-  BuildEnumMemberElementsTask -> CREATED_RESOLVED_UNIT2
-  BuildEnumMemberElementsTask -> RESOLVED_UNIT2
+  BuildEnumMemberElementsTask -> CREATED_RESOLVED_UNIT3
+  BuildEnumMemberElementsTask -> RESOLVED_UNIT3
   BuildExportNamespaceTask -> LIBRARY_ELEMENT4
   BuildLibraryElementTask -> BUILD_LIBRARY_ERRORS
   BuildLibraryElementTask -> IS_LAUNCHABLE
   BuildLibraryElementTask -> LIBRARY_ELEMENT1
   BuildPublicNamespaceTask -> LIBRARY_ELEMENT3
   BuildSourceExportClosureTask -> EXPORT_SOURCE_CLOSURE
   BuildTypeProviderTask -> TYPE_PROVIDER
   COMPILATION_UNIT_CONSTANTS -> EvaluateUnitConstantsTask
   COMPILATION_UNIT_CONSTANTS [shape=box]
   COMPILATION_UNIT_ELEMENT [shape=box]
   CONSTANT_DEPENDENCIES -> ComputeConstantValueTask
   CONSTANT_DEPENDENCIES [shape=box]
   CONSTANT_EXPRESSIONS_DEPENDENCIES -> EvaluateUnitConstantsTask
   CONSTANT_EXPRESSIONS_DEPENDENCIES [shape=box]
   CONSTANT_EXPRESSION_RESOLVED -> ComputeConstantDependenciesTask
   CONSTANT_EXPRESSION_RESOLVED [shape=box]
   CONSTANT_VALUE -> ComputeConstantValueTask
   CONSTANT_VALUE -> EvaluateUnitConstantsTask
   CONSTANT_VALUE [shape=box]
   CONTAINING_LIBRARIES -> DartErrorsTask
   CONTAINING_LIBRARIES [shape=box]
   CONTENT -> ScanDartTask
   CONTENT [shape=box]
   CREATED_RESOLVED_UNIT [shape=box]
   CREATED_RESOLVED_UNIT1 [shape=box]
-  CREATED_RESOLVED_UNIT10 -> ResolveConstantExpressionTask
+  CREATED_RESOLVED_UNIT10 -> InferInstanceMembersInUnitTask
+  CREATED_RESOLVED_UNIT10 -> InferStaticVariableTypeTask
+  CREATED_RESOLVED_UNIT10 -> PartiallyResolveUnitReferencesTask
+  CREATED_RESOLVED_UNIT10 -> ResolveInstanceFieldsInUnitTask
+  CREATED_RESOLVED_UNIT10 -> ResolveUnitTask
   CREATED_RESOLVED_UNIT10 [shape=box]
+  CREATED_RESOLVED_UNIT11 -> ResolveConstantExpressionTask
   CREATED_RESOLVED_UNIT11 [shape=box]
+  CREATED_RESOLVED_UNIT12 [shape=box]
   CREATED_RESOLVED_UNIT2 [shape=box]
   CREATED_RESOLVED_UNIT3 [shape=box]
   CREATED_RESOLVED_UNIT4 [shape=box]
   CREATED_RESOLVED_UNIT5 [shape=box]
   CREATED_RESOLVED_UNIT6 [shape=box]
-  CREATED_RESOLVED_UNIT7 -> ResolveInstanceFieldsInUnitTask
   CREATED_RESOLVED_UNIT7 [shape=box]
-  CREATED_RESOLVED_UNIT8 -> InferInstanceMembersInUnitTask
+  CREATED_RESOLVED_UNIT8 -> ResolveInstanceFieldsInUnitTask
   CREATED_RESOLVED_UNIT8 [shape=box]
   CREATED_RESOLVED_UNIT9 -> InferInstanceMembersInUnitTask
-  CREATED_RESOLVED_UNIT9 -> InferStaticVariableTypeTask
-  CREATED_RESOLVED_UNIT9 -> PartiallyResolveUnitReferencesTask
-  CREATED_RESOLVED_UNIT9 -> ResolveInstanceFieldsInUnitTask
-  CREATED_RESOLVED_UNIT9 -> ResolveUnitTask
   CREATED_RESOLVED_UNIT9 [shape=box]
   ComputeConstantDependenciesTask -> CONSTANT_DEPENDENCIES
   ComputeConstantValueTask -> CONSTANT_VALUE
   ComputeInferableStaticVariableDependenciesTask -> INFERABLE_STATIC_VARIABLE_DEPENDENCIES
   ComputeLibraryCycleTask -> LIBRARY_CYCLE
   ComputeLibraryCycleTask -> LIBRARY_CYCLE_DEPENDENCIES
   ComputeLibraryCycleTask -> LIBRARY_CYCLE_UNITS
   ComputePropagableVariableDependenciesTask -> PROPAGABLE_VARIABLE_DEPENDENCIES
   ContainingLibrariesTask -> CONTAINING_LIBRARIES
   DART_ERRORS -> LibraryErrorsReadyTask
   DART_ERRORS [shape=box]
   DART_SCRIPTS -> ScanDartTask
   DART_SCRIPTS [shape=box]
   DartErrorsTask -> DART_ERRORS
   EXPLICITLY_IMPORTED_LIBRARIES [shape=box]
   EXPORTED_LIBRARIES -> BuildDirectiveElementsTask
   EXPORTED_LIBRARIES -> ReadyLibraryElement2Task
   EXPORTED_LIBRARIES -> ReadyLibraryElement5Task
   EXPORTED_LIBRARIES -> ReadyLibraryElement6Task
   EXPORTED_LIBRARIES [shape=box]
   EXPORT_SOURCE_CLOSURE -> BuildExportNamespaceTask
   EXPORT_SOURCE_CLOSURE [shape=box]
-  EvaluateUnitConstantsTask -> CREATED_RESOLVED_UNIT11
-  EvaluateUnitConstantsTask -> RESOLVED_UNIT11
+  EvaluateUnitConstantsTask -> CREATED_RESOLVED_UNIT12
+  EvaluateUnitConstantsTask -> RESOLVED_UNIT12
   GatherUsedImportedElementsTask -> USED_IMPORTED_ELEMENTS
   GatherUsedLocalElementsTask -> USED_LOCAL_ELEMENTS
   GenerateHintsTask -> HINTS
   GenerateLintsTask -> LINTS
   HINTS -> LibraryUnitErrorsTask
   HINTS [shape=box]
   IMPORTED_LIBRARIES -> BuildDirectiveElementsTask
   IMPORTED_LIBRARIES -> ReadyLibraryElement2Task
   IMPORTED_LIBRARIES -> ReadyLibraryElement5Task
   IMPORTED_LIBRARIES -> ReadyLibraryElement6Task
   IMPORTED_LIBRARIES -> ResolveUnitTypeNamesTask
   IMPORTED_LIBRARIES [shape=box]
   INCLUDED_PARTS -> BuildLibraryElementTask
   INCLUDED_PARTS [shape=box]
   INFERABLE_STATIC_VARIABLES_IN_UNIT -> InferStaticVariableTypesInUnitTask
   INFERABLE_STATIC_VARIABLES_IN_UNIT [shape=box]
   INFERABLE_STATIC_VARIABLE_DEPENDENCIES -> InferStaticVariableTypeTask
   INFERABLE_STATIC_VARIABLE_DEPENDENCIES [shape=box]
   INFERRED_STATIC_VARIABLE -> InferStaticVariableTypeTask
   INFERRED_STATIC_VARIABLE -> InferStaticVariableTypesInUnitTask
   INFERRED_STATIC_VARIABLE [shape=box]
   IS_LAUNCHABLE [shape=box]
-  InferInstanceMembersInUnitTask -> CREATED_RESOLVED_UNIT9
-  InferInstanceMembersInUnitTask -> RESOLVED_UNIT9
+  InferInstanceMembersInUnitTask -> CREATED_RESOLVED_UNIT10
+  InferInstanceMembersInUnitTask -> RESOLVED_UNIT10
   InferStaticVariableTypeTask -> INFERRED_STATIC_VARIABLE
-  InferStaticVariableTypesInUnitTask -> CREATED_RESOLVED_UNIT7
-  InferStaticVariableTypesInUnitTask -> RESOLVED_UNIT7
+  InferStaticVariableTypesInUnitTask -> CREATED_RESOLVED_UNIT8
+  InferStaticVariableTypesInUnitTask -> RESOLVED_UNIT8
   LIBRARY_CYCLE [shape=box]
   LIBRARY_CYCLE_DEPENDENCIES -> InferInstanceMembersInUnitTask
   LIBRARY_CYCLE_DEPENDENCIES -> InferStaticVariableTypeTask
   LIBRARY_CYCLE_DEPENDENCIES -> PartiallyResolveUnitReferencesTask
   LIBRARY_CYCLE_DEPENDENCIES -> ResolveInstanceFieldsInUnitTask
   LIBRARY_CYCLE_DEPENDENCIES [shape=box]
   LIBRARY_CYCLE_UNITS -> InferInstanceMembersInUnitTask
   LIBRARY_CYCLE_UNITS -> ResolveInstanceFieldsInUnitTask
   LIBRARY_CYCLE_UNITS -> ResolveUnitTask
   LIBRARY_CYCLE_UNITS [shape=box]
   LIBRARY_ELEMENT -> LibraryErrorsReadyTask
   LIBRARY_ELEMENT [shape=box]
   LIBRARY_ELEMENT1 -> BuildDirectiveElementsTask
   LIBRARY_ELEMENT1 -> ResolveVariableReferencesTask
   LIBRARY_ELEMENT1 [shape=box]
   LIBRARY_ELEMENT2 -> BuildPublicNamespaceTask
   LIBRARY_ELEMENT2 -> BuildSourceExportClosureTask
   LIBRARY_ELEMENT2 -> ComputeLibraryCycleTask
   LIBRARY_ELEMENT2 -> ReadyLibraryElement2Task
+  LIBRARY_ELEMENT2 -> ResolveDirectiveElementsTask
   LIBRARY_ELEMENT2 [shape=box]
   LIBRARY_ELEMENT3 -> BuildExportNamespaceTask
   LIBRARY_ELEMENT3 -> BuildTypeProviderTask
   LIBRARY_ELEMENT3 [shape=box]
   LIBRARY_ELEMENT4 -> ResolveLibraryTypeNamesTask
   LIBRARY_ELEMENT4 -> ResolveUnitTypeNamesTask
   LIBRARY_ELEMENT4 [shape=box]
   LIBRARY_ELEMENT5 -> PartiallyResolveUnitReferencesTask
   LIBRARY_ELEMENT5 -> PropagateVariableTypesInLibraryTask
   LIBRARY_ELEMENT5 -> ReadyLibraryElement5Task
@@ skipping 40 matching lines @@
   PROPAGATED_VARIABLE [shape=box]
   ParseDartTask -> EXPLICITLY_IMPORTED_LIBRARIES
   ParseDartTask -> EXPORTED_LIBRARIES
   ParseDartTask -> IMPORTED_LIBRARIES
   ParseDartTask -> INCLUDED_PARTS
   ParseDartTask -> LIBRARY_SPECIFIC_UNITS
   ParseDartTask -> PARSED_UNIT
   ParseDartTask -> PARSE_ERRORS
   ParseDartTask -> SOURCE_KIND
   ParseDartTask -> UNITS
-  PartiallyResolveUnitReferencesTask -> CREATED_RESOLVED_UNIT5
+  PartiallyResolveUnitReferencesTask -> CREATED_RESOLVED_UNIT6
   PartiallyResolveUnitReferencesTask -> INFERABLE_STATIC_VARIABLES_IN_UNIT
   PartiallyResolveUnitReferencesTask -> PROPAGABLE_VARIABLES_IN_UNIT
-  PartiallyResolveUnitReferencesTask -> RESOLVED_UNIT5
+  PartiallyResolveUnitReferencesTask -> RESOLVED_UNIT6
   PropagateVariableTypeTask -> PROPAGATED_VARIABLE
   PropagateVariableTypesInLibraryClosureTask -> LIBRARY_ELEMENT7
   PropagateVariableTypesInLibraryTask -> LIBRARY_ELEMENT6
-  PropagateVariableTypesInUnitTask -> CREATED_RESOLVED_UNIT6
-  PropagateVariableTypesInUnitTask -> RESOLVED_UNIT6
+  PropagateVariableTypesInUnitTask -> CREATED_RESOLVED_UNIT7
+  PropagateVariableTypesInUnitTask -> RESOLVED_UNIT7
   READY_LIBRARY_ELEMENT2 -> ComputeLibraryCycleTask
   READY_LIBRARY_ELEMENT2 -> ReadyLibraryElement2Task
   READY_LIBRARY_ELEMENT2 [shape=box]
   READY_LIBRARY_ELEMENT5 -> PartiallyResolveUnitReferencesTask
   READY_LIBRARY_ELEMENT5 -> ReadyLibraryElement5Task
   READY_LIBRARY_ELEMENT5 [shape=box]
   READY_LIBRARY_ELEMENT6 -> PropagateVariableTypesInLibraryClosureTask
   READY_LIBRARY_ELEMENT6 -> ReadyLibraryElement6Task
   READY_LIBRARY_ELEMENT6 [shape=box]
   READY_RESOLVED_UNIT -> ResolveLibraryTask
   READY_RESOLVED_UNIT -> VerifyUnitTask
   READY_RESOLVED_UNIT [shape=box]
   REFERENCED_NAMES [shape=box]
   RESOLVED_UNIT -> GenerateHintsTask
   RESOLVED_UNIT -> GenerateLintsTask
   RESOLVED_UNIT -> ReadyResolvedUnitTask
   RESOLVED_UNIT -> VerifyUnitTask
   RESOLVED_UNIT [shape=box]
   RESOLVED_UNIT1 -> BuildDirectiveElementsTask
-  RESOLVED_UNIT1 -> BuildEnumMemberElementsTask
   RESOLVED_UNIT1 -> BuildLibraryElementTask
+  RESOLVED_UNIT1 -> ResolveDirectiveElementsTask
   RESOLVED_UNIT1 [shape=box]
-  RESOLVED_UNIT10 -> EvaluateUnitConstantsTask
-  RESOLVED_UNIT10 -> GatherUsedImportedElementsTask
-  RESOLVED_UNIT10 -> GatherUsedLocalElementsTask
-  RESOLVED_UNIT10 -> ResolveLibraryReferencesTask
+  RESOLVED_UNIT10 -> ResolveUnitTask
   RESOLVED_UNIT10 [shape=box]
-  RESOLVED_UNIT11 -> StrongModeVerifyUnitTask
+  RESOLVED_UNIT11 -> EvaluateUnitConstantsTask
+  RESOLVED_UNIT11 -> GatherUsedImportedElementsTask
+  RESOLVED_UNIT11 -> GatherUsedLocalElementsTask
+  RESOLVED_UNIT11 -> ResolveLibraryReferencesTask
   RESOLVED_UNIT11 [shape=box]
-  RESOLVED_UNIT2 -> ResolveUnitTypeNamesTask
+  RESOLVED_UNIT12 -> StrongModeVerifyUnitTask
+  RESOLVED_UNIT12 [shape=box]
+  RESOLVED_UNIT2 -> BuildEnumMemberElementsTask
   RESOLVED_UNIT2 [shape=box]
-  RESOLVED_UNIT3 -> ResolveLibraryTypeNamesTask
-  RESOLVED_UNIT3 -> ResolveVariableReferencesTask
+  RESOLVED_UNIT3 -> ResolveUnitTypeNamesTask
   RESOLVED_UNIT3 [shape=box]
-  RESOLVED_UNIT4 -> PartiallyResolveUnitReferencesTask
+  RESOLVED_UNIT4 -> ResolveLibraryTypeNamesTask
+  RESOLVED_UNIT4 -> ResolveVariableReferencesTask
   RESOLVED_UNIT4 [shape=box]
-  RESOLVED_UNIT5 -> ComputeInferableStaticVariableDependenciesTask
-  RESOLVED_UNIT5 -> ComputePropagableVariableDependenciesTask
-  RESOLVED_UNIT5 -> PropagateVariableTypeTask
-  RESOLVED_UNIT5 -> PropagateVariableTypesInUnitTask
+  RESOLVED_UNIT5 -> PartiallyResolveUnitReferencesTask
   RESOLVED_UNIT5 [shape=box]
-  RESOLVED_UNIT6 -> InferStaticVariableTypeTask
-  RESOLVED_UNIT6 -> InferStaticVariableTypesInUnitTask
-  RESOLVED_UNIT6 -> PropagateVariableTypesInLibraryTask
+  RESOLVED_UNIT6 -> ComputeInferableStaticVariableDependenciesTask
+  RESOLVED_UNIT6 -> ComputePropagableVariableDependenciesTask
+  RESOLVED_UNIT6 -> PropagateVariableTypeTask
+  RESOLVED_UNIT6 -> PropagateVariableTypesInUnitTask
   RESOLVED_UNIT6 [shape=box]
-  RESOLVED_UNIT7 -> ResolveInstanceFieldsInUnitTask
+  RESOLVED_UNIT7 -> InferStaticVariableTypeTask
+  RESOLVED_UNIT7 -> InferStaticVariableTypesInUnitTask
+  RESOLVED_UNIT7 -> PropagateVariableTypesInLibraryTask
   RESOLVED_UNIT7 [shape=box]
-  RESOLVED_UNIT8 -> InferInstanceMembersInUnitTask
+  RESOLVED_UNIT8 -> ResolveInstanceFieldsInUnitTask
   RESOLVED_UNIT8 [shape=box]
-  RESOLVED_UNIT9 -> ResolveUnitTask
+  RESOLVED_UNIT9 -> InferInstanceMembersInUnitTask
   RESOLVED_UNIT9 [shape=box]
   RESOLVE_TYPE_NAMES_ERRORS -> LibraryUnitErrorsTask
   RESOLVE_TYPE_NAMES_ERRORS [shape=box]
   RESOLVE_UNIT_ERRORS -> LibraryUnitErrorsTask
   RESOLVE_UNIT_ERRORS [shape=box]
   ReadyLibraryElement2Task -> READY_LIBRARY_ELEMENT2
   ReadyLibraryElement5Task -> READY_LIBRARY_ELEMENT5
   ReadyLibraryElement6Task -> READY_LIBRARY_ELEMENT6
   ReadyResolvedUnitTask -> READY_RESOLVED_UNIT
   ResolveConstantExpressionTask -> CONSTANT_EXPRESSION_RESOLVED
-  ResolveInstanceFieldsInUnitTask -> CREATED_RESOLVED_UNIT8
-  ResolveInstanceFieldsInUnitTask -> RESOLVED_UNIT8
+  ResolveDirectiveElementsTask -> CREATED_RESOLVED_UNIT2
+  ResolveDirectiveElementsTask -> RESOLVED_UNIT2
+  ResolveInstanceFieldsInUnitTask -> CREATED_RESOLVED_UNIT9
+  ResolveInstanceFieldsInUnitTask -> RESOLVED_UNIT9
   ResolveLibraryReferencesTask -> LIBRARY_ELEMENT8
   ResolveLibraryReferencesTask -> REFERENCED_NAMES
   ResolveLibraryTask -> LIBRARY_ELEMENT
   ResolveLibraryTypeNamesTask -> LIBRARY_ELEMENT5
   ResolveUnitTask -> CONSTANT_EXPRESSIONS_DEPENDENCIES
-  ResolveUnitTask -> CREATED_RESOLVED_UNIT10
-  ResolveUnitTask -> RESOLVED_UNIT10
+  ResolveUnitTask -> CREATED_RESOLVED_UNIT11
+  ResolveUnitTask -> RESOLVED_UNIT11
   ResolveUnitTask -> RESOLVE_UNIT_ERRORS
-  ResolveUnitTypeNamesTask -> CREATED_RESOLVED_UNIT3
-  ResolveUnitTypeNamesTask -> RESOLVED_UNIT3
+  ResolveUnitTypeNamesTask -> CREATED_RESOLVED_UNIT4
+  ResolveUnitTypeNamesTask -> RESOLVED_UNIT4
   ResolveUnitTypeNamesTask -> RESOLVE_TYPE_NAMES_ERRORS
-  ResolveVariableReferencesTask -> CREATED_RESOLVED_UNIT4
-  ResolveVariableReferencesTask -> RESOLVED_UNIT4
+  ResolveVariableReferencesTask -> CREATED_RESOLVED_UNIT5
+  ResolveVariableReferencesTask -> RESOLVED_UNIT5
   ResolveVariableReferencesTask -> VARIABLE_REFERENCE_ERRORS
   SCAN_ERRORS -> dartErrorsForSource
   SCAN_ERRORS [shape=box]
   SOURCE_KIND -> BuildDirectiveElementsTask
   SOURCE_KIND [shape=box]
   STRONG_MODE_ERRORS -> LibraryUnitErrorsTask
   STRONG_MODE_ERRORS [shape=box]
   ScanDartTask -> LINE_INFO
   ScanDartTask -> SCAN_ERRORS
   ScanDartTask -> TOKEN_STREAM
@@ skipping 27 matching lines @@
   VARIABLE_REFERENCE_ERRORS -> LibraryUnitErrorsTask
   VARIABLE_REFERENCE_ERRORS [shape=box]
   VERIFY_ERRORS -> LibraryUnitErrorsTask
   VERIFY_ERRORS [shape=box]
   VerifyUnitTask -> VERIFY_ERRORS
   dartErrorsForSource -> DartErrorsTask
   dartErrorsForSource [shape=hexagon]
   dartErrorsForUnit -> DartErrorsTask
   dartErrorsForUnit [shape=hexagon]
 }