Revert collecting defined elements.

pkg/analyzer/lib/src/task/dart.dart

Index: pkg/analyzer/lib/src/task/dart.dart
diff --git a/pkg/analyzer/lib/src/task/dart.dart b/pkg/analyzer/lib/src/task/dart.dart
index 95f934eb7a1eea4036f7813a03300747edcff842..d21914cb85c2c5d52f7059e8a606fbcfba664308 100644
--- a/pkg/analyzer/lib/src/task/dart.dart
+++ b/pkg/analyzer/lib/src/task/dart.dart
@@ -271,13 +271,6 @@ final ResultDescriptor<bool> CREATED_RESOLVED_UNIT9 =
     new ResultDescriptor<bool>('CREATED_RESOLVED_UNIT9', false);
 
 /**
- * The [Element]s defined in a [LibrarySpecificUnit].
- */
-final ListResultDescriptor<Element> DEFINED_ELEMENTS =
-    new ListResultDescriptor<Element>('DEFINED_ELEMENTS', null,
-        cachingPolicy: ELEMENT_CACHING_POLICY);
-
-/**
  * The sources representing the export closure of a library.
  * The [Source]s include only library sources, not their units.
  *
@@ -2560,7 +2553,7 @@ class GatherUsedLocalElementsTask extends SourceBasedAnalysisTask {
       'GatherUsedLocalElementsTask',
       createTask,
       buildInputs,
-      <ResultDescriptor>[DEFINED_ELEMENTS, USED_LOCAL_ELEMENTS]);
+      <ResultDescriptor>[USED_LOCAL_ELEMENTS]);
 
   GatherUsedLocalElementsTask(
       InternalAnalysisContext context, AnalysisTarget target)
@@ -2575,7 +2568,7 @@ class GatherUsedLocalElementsTask extends SourceBasedAnalysisTask {
     CompilationUnitElement unitElement = unit.element;
     LibraryElement libraryElement = unitElement.library;
     //
-    // Prepare defined and used local elements.
+    // Prepare used local elements.
     //
     GatherUsedLocalElementsVisitor visitor =
         new GatherUsedLocalElementsVisitor(libraryElement);
@@ -2583,7 +2576,6 @@ class GatherUsedLocalElementsTask extends SourceBasedAnalysisTask {
     //
     // Record outputs.
     //
-    outputs[DEFINED_ELEMENTS] = visitor.definedElements;
     outputs[USED_LOCAL_ELEMENTS] = visitor.usedElements;
   }
 
@@ -2617,11 +2609,6 @@ class GenerateHintsTask extends SourceBasedAnalysisTask {
   static const String RESOLVED_UNIT_INPUT = 'RESOLVED_UNIT';
 
   /**
-   * The name of a list of [DEFINED_ELEMENTS] for each library unit input.
-   */
-  static const String DEFINED_ELEMENTS_INPUT = 'DEFINED_ELEMENTS';
-
-  /**
    * The name of a list of [USED_LOCAL_ELEMENTS] for each library unit input.
    */
   static const String USED_LOCAL_ELEMENTS_INPUT = 'USED_LOCAL_ELEMENTS';
@@ -2667,8 +2654,6 @@ class GenerateHintsTask extends SourceBasedAnalysisTask {
     CompilationUnit unit = getRequiredInput(RESOLVED_UNIT_INPUT);
     List<UsedImportedElements> usedImportedElementsList =
         getRequiredInput(USED_IMPORTED_ELEMENTS_INPUT);
-    List<List<Element>> definedElementsList =
-        getRequiredInput(DEFINED_ELEMENTS_INPUT);
     List<UsedLocalElements> usedLocalElementsList =
         getRequiredInput(USED_LOCAL_ELEMENTS_INPUT);
     CompilationUnitElement unitElement = unit.element;
@@ -2693,11 +2678,7 @@ class GenerateHintsTask extends SourceBasedAnalysisTask {
           new UsedLocalElements.merge(usedLocalElementsList);
       UnusedLocalElementsVerifier visitor =
           new UnusedLocalElementsVerifier(errorListener, usedElements);
-      for (List<Element> definedElements in definedElementsList) {
-        for (Element element in definedElements) {
-          element.accept(visitor);
-        }
-      }
+      unitElement.accept(visitor);
     }
     // Dart2js analysis.
     if (analysisOptions.dart2jsHint) {
@@ -2729,8 +2710,6 @@ class GenerateHintsTask extends SourceBasedAnalysisTask {
     Source libSource = unit.library;
     return <String, TaskInput>{
       RESOLVED_UNIT_INPUT: RESOLVED_UNIT.of(unit),
-      DEFINED_ELEMENTS_INPUT:
-          LIBRARY_SPECIFIC_UNITS.of(libSource).toListOf(DEFINED_ELEMENTS),
       USED_LOCAL_ELEMENTS_INPUT:
           LIBRARY_SPECIFIC_UNITS.of(libSource).toListOf(USED_LOCAL_ELEMENTS),
       USED_IMPORTED_ELEMENTS_INPUT: