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 7761f31bb554c87ac46a83e389ee2928acd535e8..dee2e0280eac6f2a545f7933652b00d0c2e7388c 100644
--- a/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
+++ b/pkg/front_end/lib/src/incremental_kernel_generator_impl.dart
@@ -17,8 +17,8 @@ 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;
 
 dynamic unimplemented() {
@@ -121,6 +121,7 @@ class IncrementalKernelGeneratorImpl implements IncrementalKernelGenerator {
           if (_latestSignature[uri] != result.signature) {
             _latestSignature[uri] = result.signature;
             program.libraries.add(library);
+            library.parent = program;
           }
         }
       }
@@ -222,6 +223,7 @@ 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.');
@@ -281,8 +283,7 @@ 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();
   }
 }