Add LimitedBinaryPrinter, tests and switch incremental generator to it.

pkg/front_end/lib/src/incremental_kernel_generator_impl.dart

Index: pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
diff --git a/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart b/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
index a6521d3a7882e107f6de223f825ed93c536947ea..650182c3e889f8d87334fadbd109b541cb31f96e 100644
--- a/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
+++ b/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
@@ -18,6 +18,7 @@ import 'package:front_end/src/fasta/ticker.dart';
 import 'package:front_end/src/fasta/translate_uri.dart';
 import 'package:front_end/src/incremental/byte_store.dart';
 import 'package:front_end/src/incremental/file_state.dart';
+import 'package:front_end/src/incremental/limited_ast_to_binary.dart';
 import 'package:kernel/binary/ast_from_binary.dart';
 import 'package:kernel/binary/ast_to_binary.dart';
 import 'package:kernel/kernel.dart' hide Source;
@@ -122,6 +123,7 @@ class IncrementalKernelGeneratorImpl implements IncrementalKernelGenerator {
           if (_latestSignature[uri] != result.signature) {
             _latestSignature[uri] = result.signature;
             program.libraries.add(library);
+            library.parent = program;
           }
         }
       }
@@ -223,6 +225,7 @@ class IncrementalKernelGeneratorImpl implements IncrementalKernelGenerator {
 
       _logger.run('Serialize ${kernelLibraries.length} libraries', () {
         program.unbindCanonicalNames();
+        program.uriToSource.clear();
         List<int> bytes = _writeProgramBytes(program, kernelLibraries.contains);
         _byteStore.put(kernelKey, bytes);
         _logger.writeln('Stored ${bytes.length} bytes.');
@@ -282,8 +285,7 @@ class IncrementalKernelGeneratorImpl implements IncrementalKernelGenerator {
 
   List<int> _writeProgramBytes(Program program, bool filter(Library library)) {
     ByteSink byteSink = new ByteSink();
-    new LibraryFilteringBinaryPrinter(byteSink, filter)
-        .writeProgramFile(program);
+    new LimitedBinaryPrinter(byteSink, filter).writeProgramFile(program);
     return byteSink.builder.takeBytes();
   }
 }