Remove LibraryElement.isUpToDate().

pkg/analyzer/lib/src/dart/element/element.dart

 // Copyright (c) 2014, 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.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 5804 matching lines @@
           library._libraryCycle = null;
         }
         library.exportedLibraries.forEach(invalidate);
         library.importedLibraries.forEach(invalidate);
       }
     }
 
     invalidate(this);
   }
 
-  @override
-  bool isUpToDate(int timeStamp) {
-    Set<LibraryElement> visitedLibraries = new Set();
-    return _safeIsUpToDate(this, timeStamp, visitedLibraries);
-  }
-
   /**
    * Set whether the library has the given [capability] to
    * correspond to the given [value].
    */
   void setResolutionCapability(
       LibraryResolutionCapability capability, bool value) {
     _resolutionCapabilities =
         BooleanArray.set(_resolutionCapabilities, capability.index, value);
   }
 
@@ skipping 37 matching lines @@
   }
 
   /**
    * Return `true` if the [library] has the given [capability].
    */
   static bool hasResolutionCapability(
       LibraryElement library, LibraryResolutionCapability capability) {
     return library is LibraryElementImpl &&
         BooleanArray.get(library._resolutionCapabilities, capability.index);
   }
-
-  /**
-   * Return `true` if the given [library] is up to date with respect to the
-   * given [timeStamp]. The set of [visitedLibraries] is used to prevent
-   * infinite recursion in the case of mutually dependent libraries.
-   */
-  static bool _safeIsUpToDate(LibraryElement library, int timeStamp,
-      Set<LibraryElement> visitedLibraries) {
-    if (!visitedLibraries.contains(library)) {
-      visitedLibraries.add(library);
-      AnalysisContext context = library.context;
-      // Check the defining compilation unit.
-      if (timeStamp <
-          context
-              .getModificationStamp(library.definingCompilationUnit.source)) {
-        return false;
-      }
-      // Check the parted compilation units.
-      for (CompilationUnitElement element in library.parts) {
-        if (timeStamp < context.getModificationStamp(element.source)) {
-          return false;
-        }
-      }
-      // Check the imported libraries.
-      for (LibraryElement importedLibrary in library.importedLibraries) {
-        if (!_safeIsUpToDate(importedLibrary, timeStamp, visitedLibraries)) {
-          return false;
-        }
-      }
-      // Check the exported libraries.
-      for (LibraryElement exportedLibrary in library.exportedLibraries) {
-        if (!_safeIsUpToDate(exportedLibrary, timeStamp, visitedLibraries)) {
-          return false;
-        }
-      }
-    }
-    return true;
-  }
 }
 
 /**
  * Enum of possible resolution capabilities that a [LibraryElementImpl] has.
  */
 enum LibraryResolutionCapability {
   /**
    * All elements have their types resolved.
    */
   resolvedTypeNames,
@@ skipping 2461 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }