Reapply CL: first step for modular support in fasta

pkg/front_end/testcases/shaker/empty_program.dart.shaker

Index: pkg/front_end/testcases/shaker/empty_program.dart.shaker
diff --git a/pkg/front_end/testcases/shaker/empty_program.dart.shaker b/pkg/front_end/testcases/shaker/empty_program.dart.shaker
new file mode 100644
index 0000000000000000000000000000000000000000..bd990e7d782b25e93cfcaed30f7eef1f9da911bb
--- /dev/null
+++ b/pkg/front_end/testcases/shaker/empty_program.dart.shaker
@@ -0,0 +1,72 @@
+DO NOT EDIT -- this file is autogenerated ---
+Tree-shaker preserved the following:
+
+library dart:async:
+  - member dart.async::_asyncThenWrapperHelper
+  - member dart.async::_asyncErrorWrapperHelper
+  - member dart.async::_awaitHelper
+  - class _AsyncStarStreamController
+    - (default constructor)
+  - class FutureOr
+  - class Future
+    - microtask
+  - class Completer
+    - sync
+  - class Stream
+  - class StreamIterator
+  - class _StreamIterator
+    - (default constructor)
+
+library dart:collection:
+  - class IterableBase
+
+library dart:_internal:
+  - class ExternalName
+    - (default constructor)
+  - class EfficientLengthIterable
+  - class Symbol
+
+library dart:core:
+  - member print
+  - class _SyncIterable
+    - (default constructor)
+  - class _InvocationMirror
+    - (default constructor)
+  - class bool
+  - class Comparable
+  - class double
+  - class Function
+  - class int
+  - class Invocation
+  - class Iterable
+  - class Iterator
+  - class List
+    - from
+  - class Map
+  - class Null
+  - class num
+  - class Object
+    - dart.core::_hashCodeRnd
+    - (default constructor)
+    - ==
+    - hashCode
+    - toString
+    - noSuchMethod
+    - runtimeType
+    - dart.core::_getHash
+    - dart.core::_setHash
+    - dart.core::_objectHashCode
+    - dart.core::_identityHashCode
+    - dart.core::_toString
+    - dart.core::_noSuchMethod
+    - dart.core::_haveSameRuntimeType
+    - dart.core::_instanceOf
+    - dart.core::_simpleInstanceOf
+    - dart.core::_simpleInstanceOfTrue
+    - dart.core::_simpleInstanceOfFalse
+    - dart.core::_as
+    - dart.core::_symbolMapToStringMap
+  - class Pattern
+  - class String
+  - class Symbol
+  - class Type