Eliminate dependencies on pkg/front_end.

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

Index: pkg/analyzer/lib/src/dart/analysis/byte_store.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/byte_store.dart b/pkg/analyzer/lib/src/dart/analysis/byte_store.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4fe31e64d9854958ae068d9993c130e3aff14727
--- /dev/null
+++ b/pkg/analyzer/lib/src/dart/analysis/byte_store.dart
@@ -0,0 +1,9 @@
+// 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.
+
+// This library re-exports the parts of front_end's byte_store.dart whose API is
+// stable enough to be relied upon by clients.
+
+export 'package:front_end/src/incremental/byte_store.dart'
+    show ByteStore, MemoryByteStore, MemoryCachingByteStore;

[Siggi Cherem (dart-lang), 2017/08/07 16:57:10]

not now, but would it make sense to eventually move these to a separate package?

For now, should we move them to a different folder to make sure in our
subpacakge_tests cover that we never import fasta from these files? (that way we
ensure we don't expose indirectly internal types that are in more flux)?

[Paul Berry, 2017/08/07 17:04:33]

Sure, I'll do that as a follow-up CL.