[kernel] [partial] Streaming of kernel binary without AST nodes

pkg/kernel/lib/ast.dart

Index: pkg/kernel/lib/ast.dart
diff --git a/pkg/kernel/lib/ast.dart b/pkg/kernel/lib/ast.dart
index f051b14ade22132f252350ab363b45c0099bf252..716be8cf801a7fb5ff7c5f7293c2fb910416b1aa 100644
--- a/pkg/kernel/lib/ast.dart
+++ b/pkg/kernel/lib/ast.dart
@@ -3586,6 +3586,9 @@ class VariableDeclaration extends Statement {
   int flags = 0;
   DartType type; // Not null, defaults to dynamic.
 
+  /// Offset of the declaration, set and used when writing the binary.
+  int binaryOffset = -1;
+
   /// For locals, this is the initial value.
   /// For parameters, this is the default value.
   ///
@@ -4148,6 +4151,9 @@ class TypeParameter extends TreeNode {
   /// be set to the root class for type parameters without an explicit bound.
   DartType bound;
 
+  /// Offset of the declaration, set and used when writing the binary.
+  int binaryOffset = 0;
+
   TypeParameter([this.name, this.bound]);
 
   accept(TreeVisitor v) => v.visitTypeParameter(this);