[kernel] Streaming ScopeBuilder

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index a86294d01f2fffedea04bcdd0753debe1494a31e..95a4ea30dd7b89a45b56708dc88c752b801fe21b 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -485,6 +485,7 @@ class BinaryBuilder {
     int fileOffset = readOffset();
     int fileEndOffset = readOffset();
     int flags = readByte();
+    readUInt(); // parent class binary offset.
     var name = readName();
     var fileUri = readUriReference();
     var annotations = readAnnotationList(node);
@@ -521,6 +522,7 @@ class BinaryBuilder {
     var fileOffset = readOffset();
     var fileEndOffset = readOffset();
     var flags = readByte();
+    readUInt(); // parent class binary offset.
     var name = readName();
     var annotations = readAnnotationList(node);
     debugPath.add(node.name?.name ?? 'constructor');
@@ -558,6 +560,7 @@ class BinaryBuilder {
     int kindIndex = readByte();
     var kind = ProcedureKind.values[kindIndex];
     var flags = readByte();
+    readUInt(); // parent class binary offset.
     var name = readName();
     var fileUri = readUriReference();
     var annotations = readAnnotationList(node);
@@ -606,6 +609,8 @@ class BinaryBuilder {
   }
 
   FunctionNode readFunctionNode() {
+    int tag = readByte();
+    assert(tag == Tag.FunctionNode);
     int offset = readOffset();
     int endOffset = readOffset();
     AsyncMarker asyncMarker = AsyncMarker.values[readByte()];