Move [file_]byte_store.dart into pkg/front_end/test/src/incremental/.

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

Index: pkg/analyzer/lib/src/dart/analysis/library_context.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/library_context.dart b/pkg/analyzer/lib/src/dart/analysis/library_context.dart
index 9ec2aea835b4eefe1b688978b8367c0b459d8d8f..2d6627289e4de585c9fce38a399a677b1c8368bf 100644
--- a/pkg/analyzer/lib/src/dart/analysis/library_context.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/library_context.dart
@@ -8,7 +8,6 @@ import 'package:analyzer/dart/element/element.dart'
     show CompilationUnitElement, LibraryElement;
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/context/context.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'
@@ -20,6 +19,7 @@ import 'package:analyzer/src/summary/link.dart';
 import 'package:analyzer/src/summary/package_bundle_reader.dart';
 import 'package:analyzer/src/task/dart.dart' show COMPILATION_UNIT_ELEMENT;
 import 'package:analyzer/task/dart.dart' show LibrarySpecificUnit;
+import 'package:front_end/src/incremental/byte_store.dart';
 
 /**
  * Context information necessary to analyze one or more libraries within an