Remove unused AnalysisContextImpl.findElementById().

pkg/analyzer/lib/src/generated/engine.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import "dart:math" as math;
@@ skipping 1778 matching lines @@
   bool exists(Source source) {
     if (source == null) {
       return false;
     }
     if (_contentCache.getContents(source) != null) {
       return true;
     }
     return source.exists();
   }
 
-  Element findElementById(int id) {
-    _ElementByIdFinder finder = new _ElementByIdFinder(id);
-    try {
-      MapIterator<Source, SourceEntry> iterator = _cache.iterator();
-      while (iterator.moveNext()) {
-        SourceEntry sourceEntry = iterator.value;
-        if (sourceEntry.kind == SourceKind.LIBRARY) {
-          DartEntry dartEntry = sourceEntry;
-          LibraryElement library = dartEntry.getValue(DartEntry.ELEMENT);
-          if (library != null) {
-            library.accept(finder);
-          }
-        }
-      }
-    } on _ElementByIdFinderException {
-      return finder.result;
-    }
-    return null;
-  }
-
   @override
   cache.CacheEntry getCacheEntry(AnalysisTarget target) {
     return null;
   }
 
   @override
   CompilationUnitElement getCompilationUnitElement(
       Source unitSource, Source librarySource) {
     LibraryElement libraryElement = getLibraryElement(librarySource);
     if (libraryElement != null) {
@@ skipping 9851 matching lines @@
     PendingFuture pendingFuture =
         new PendingFuture<T>(_context, source, computeValue);
     if (!pendingFuture.evaluate(sourceEntry)) {
       _context._pendingFutureSources
           .putIfAbsent(source, () => <PendingFuture>[])
           .add(pendingFuture);
     }
     return pendingFuture.future;
   }
 }
-
-class _ElementByIdFinder extends GeneralizingElementVisitor {
-  final int _id;
-  Element result;
-
-  _ElementByIdFinder(this._id);
-
-  @override
-  visitElement(Element element) {
-    if (element.id == _id) {
-      result = element;
-      throw new _ElementByIdFinderException();
-    }
-    super.visitElement(element);
-  }
-}
-
-class _ElementByIdFinderException {}