Revert 6ad38498c8673f1fbe3e12c49b1cf590305676dd (PARSED_UNIT).

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".
@@ skipping 175 matching lines @@
   LINTS [shape=box]
   LibraryErrorsReadyTask -> LIBRARY_ERRORS_READY
   LibraryUnitErrorsTask -> LIBRARY_UNIT_ERRORS
   MODIFICATION_TIME -> BuildDirectiveElementsTask
   MODIFICATION_TIME -> ParseDartTask
   MODIFICATION_TIME -> ScanDartTask
   MODIFICATION_TIME -> VerifyUnitTask
   MODIFICATION_TIME [shape=box]
   PARSED_UNIT -> BuildCompilationUnitElementTask
   PARSED_UNIT [shape=box]
-  PARSED_UNIT1 -> ResolveDirectivesTask
-  PARSED_UNIT1 [shape=box]
   PARSE_ERRORS -> dartErrorsForSource
   PARSE_ERRORS [shape=box]
   PENDING_ERRORS -> VerifyUnitTask
   PENDING_ERRORS [shape=box]
   PROPAGABLE_VARIABLES_IN_UNIT -> PropagateVariableTypesInUnitTask
   PROPAGABLE_VARIABLES_IN_UNIT [shape=box]
   PROPAGABLE_VARIABLE_DEPENDENCIES -> PropagateVariableTypeTask
   PROPAGABLE_VARIABLE_DEPENDENCIES [shape=box]
   PROPAGATED_VARIABLE -> PropagateVariableTypeTask
   PROPAGATED_VARIABLE -> PropagateVariableTypesInUnitTask
   PROPAGATED_VARIABLE [shape=box]
-  ParseDartTask -> PARSED_UNIT1
+  ParseDartTask -> EXPLICITLY_IMPORTED_LIBRARIES
+  ParseDartTask -> EXPORTED_LIBRARIES
+  ParseDartTask -> IMPORTED_LIBRARIES
+  ParseDartTask -> INCLUDED_PARTS
+  ParseDartTask -> LIBRARY_SPECIFIC_UNITS
+  ParseDartTask -> PARSED_UNIT
   ParseDartTask -> PARSE_ERRORS
   ParseDartTask -> REFERENCED_NAMES
+  ParseDartTask -> REFERENCED_SOURCES
   ParseDartTask -> SOURCE_KIND
+  ParseDartTask -> UNITS
   PartiallyResolveUnitReferencesTask -> CREATED_RESOLVED_UNIT7
   PartiallyResolveUnitReferencesTask -> INFERABLE_STATIC_VARIABLES_IN_UNIT
   PartiallyResolveUnitReferencesTask -> PROPAGABLE_VARIABLES_IN_UNIT
   PartiallyResolveUnitReferencesTask -> RESOLVED_UNIT7
   PropagateVariableTypeTask -> PROPAGATED_VARIABLE
   PropagateVariableTypesInLibraryClosureTask -> LIBRARY_ELEMENT8
   PropagateVariableTypesInLibraryTask -> LIBRARY_ELEMENT7
   PropagateVariableTypesInUnitTask -> CREATED_RESOLVED_UNIT8
   PropagateVariableTypesInUnitTask -> RESOLVED_UNIT8
   READY_LIBRARY_ELEMENT2 -> ComputeLibraryCycleTask
@@ skipping 51 matching lines @@
   RESOLVED_UNIT7 -> ComputePropagableVariableDependenciesTask
   RESOLVED_UNIT7 -> PropagateVariableTypeTask
   RESOLVED_UNIT7 -> PropagateVariableTypesInUnitTask
   RESOLVED_UNIT7 [shape=box]
   RESOLVED_UNIT8 -> InferStaticVariableTypeTask
   RESOLVED_UNIT8 -> InferStaticVariableTypesInUnitTask
   RESOLVED_UNIT8 -> PropagateVariableTypesInLibraryTask
   RESOLVED_UNIT8 [shape=box]
   RESOLVED_UNIT9 -> ResolveInstanceFieldsInUnitTask
   RESOLVED_UNIT9 [shape=box]
-  RESOLVE_DIRECTIVES_ERRORS -> dartErrorsForSource
-  RESOLVE_DIRECTIVES_ERRORS [shape=box]
   RESOLVE_TYPE_BOUNDS_ERRORS -> LibraryUnitErrorsTask
   RESOLVE_TYPE_BOUNDS_ERRORS [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_ELEMENT6
   ReadyLibraryElement6Task -> READY_LIBRARY_ELEMENT7
   ReadyResolvedUnitTask -> READY_RESOLVED_UNIT
   ResolveConstantExpressionTask -> CONSTANT_EXPRESSION_RESOLVED
   ResolveDirectiveElementsTask -> CREATED_RESOLVED_UNIT2
   ResolveDirectiveElementsTask -> RESOLVED_UNIT2
-  ResolveDirectivesTask -> EXPLICITLY_IMPORTED_LIBRARIES
-  ResolveDirectivesTask -> EXPORTED_LIBRARIES
-  ResolveDirectivesTask -> IMPORTED_LIBRARIES
-  ResolveDirectivesTask -> INCLUDED_PARTS
-  ResolveDirectivesTask -> LIBRARY_SPECIFIC_UNITS
-  ResolveDirectivesTask -> PARSED_UNIT
-  ResolveDirectivesTask -> REFERENCED_SOURCES
-  ResolveDirectivesTask -> RESOLVE_DIRECTIVES_ERRORS
-  ResolveDirectivesTask -> UNITS
   ResolveInstanceFieldsInUnitTask -> CREATED_RESOLVED_UNIT10
   ResolveInstanceFieldsInUnitTask -> RESOLVED_UNIT10
   ResolveLibraryReferencesTask -> LIBRARY_ELEMENT9
   ResolveLibraryTask -> LIBRARY_ELEMENT
   ResolveLibraryTypeNamesTask -> LIBRARY_ELEMENT6
   ResolveTopLevelLibraryTypeBoundsTask -> LIBRARY_ELEMENT5
   ResolveTopLevelUnitTypeBoundsTask -> CREATED_RESOLVED_UNIT4
   ResolveTopLevelUnitTypeBoundsTask -> RESOLVED_UNIT4
   ResolveTopLevelUnitTypeBoundsTask -> RESOLVE_TYPE_BOUNDS_ERRORS
   ResolveUnitTask -> CONSTANT_EXPRESSIONS_DEPENDENCIES
@@ skipping 47 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]
 }