Migrate DDC to the new analysis driver.

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

 // Copyright (c) 2017, 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:collection';
 import 'dart:typed_data';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/package_bundle_reader.dart';
 
 /**
  * Callback used by [FileTracker] to report to its client that files have been
  * added, changed, or removed, and therefore more analysis may be necessary.
  */
 typedef void FileTrackerChangeHook();
 
 /**
  * Maintains the file system state needed by the analysis driver, as well as
  * information about files that have changed and the impact of those changes.
@@ skipping 22 matching lines @@
    * The current file system state.
    */
   final FileSystemState fsState;
 
   /**
    * The set of added files.
    */
   final addedFiles = new LinkedHashSet<String>();
 
   /**
+   * TODO(scheglov) document
+   */
+  final SummaryDataStore externalSummaries;
+
+  /**
    * The set of files were reported as changed through [changeFile] and not
    * checked for actual changes yet.
    */
   final _changedFiles = new LinkedHashSet<String>();
 
   /**
    * The set of files that are currently scheduled for analysis.
    */
   final _pendingFiles = new LinkedHashSet<String>();
 
   FileTracker(
       this.logger,
       ByteStore byteStore,
       FileContentOverlay contentOverlay,
       ResourceProvider resourceProvider,
       SourceFactory sourceFactory,
       AnalysisOptions analysisOptions,
       Uint32List salt,
+      this.externalSummaries,
       this._changeHook)
       : fsState = new FileSystemState(logger, byteStore, contentOverlay,
-            resourceProvider, sourceFactory, analysisOptions, salt);
+            resourceProvider, sourceFactory, analysisOptions, salt,
+            externalSummaries: externalSummaries);
 
   /**
    * Returns the path to exactly one that needs analysis.  Throws a [StateError]
    * if no files need analysis.
    */
   String get anyPendingFile => _pendingFiles.first;
 
   /**
    * Returns a boolean indicating whether there are any files that have changed,
    * but for which the impact of the changes hasn't been measured.
@@ skipping 105 matching lines @@
       // If the file has not been accessed yet, we either will eventually read
       // it later while analyzing one of the added files, or don't need it.
       if (fsState.knownFilePaths.contains(path)) {
         verifyApiSignature(path);
       }
       return true;
     }
     return false;
   }
 }