Add support for external summaries bundle in AnalysisDriver.

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

Index: pkg/analyzer/lib/src/dart/analysis/file_tracker.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/file_tracker.dart b/pkg/analyzer/lib/src/dart/analysis/file_tracker.dart
index aaee8104f84313c7ef021c54a61ea9b15c127425..b448c57107c0d552d34985f1951bcd14a082b589 100644
--- a/pkg/analyzer/lib/src/dart/analysis/file_tracker.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/file_tracker.dart
@@ -11,6 +11,7 @@ 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
@@ -90,9 +91,11 @@ class FileTracker {
       SourceFactory sourceFactory,
       AnalysisOptions analysisOptions,
       Uint32List salt,
+      SummaryDataStore 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]