When a file is removed from the driver, reschedule full analysis.

pkg/analyzer/lib/src/dart/analysis/file_state.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/error/listener.dart';
@@ skipping 643 matching lines @@
     FileState canonicalFile = getFileForPath(path);
     List<FileState> allFiles = _pathToFiles[path].toList();
     if (allFiles.length == 1) {
       return allFiles;
     }
     return allFiles
       ..remove(canonicalFile)
       ..insert(0, canonicalFile);
   }
 
+  /**
+   * Remove the file with the given [path].
+   */
+  void removeFile(String path) {
+    _uriToFile.clear();
+    knownFilePaths.clear();
+    _pathToFiles.clear();
+    _pathToCanonicalFile.clear();
+    _partToLibraries.clear();
+  }
+
   void _addFileWithPath(String path, FileState file) {
     var files = _pathToFiles[path];
     if (files == null) {
       knownFilePaths.add(path);
       files = <FileState>[];
       _pathToFiles[path] = files;
     }
     files.add(file);
   }
 }
 
 @visibleForTesting
 class FileSystemStateTestView {
   final FileSystemState state;
 
   FileSystemStateTestView(this.state);
 
   Set<FileState> get filesWithoutTransitiveFiles {
     return state._uriToFile.values
         .where((f) => f._transitiveFiles == null)
         .toSet();
   }
 
   Set<FileState> get filesWithoutTransitiveSignature {
     return state._uriToFile.values
         .where((f) => f._transitiveSignature == null)
         .toSet();
   }
 }