Add line starts into unlinked units.

pkg/analyzer/lib/src/summary/summarize_ast.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization.summarize_ast;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/type.dart' show DartType;
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/public_namespace_computer.dart';
 import 'package:analyzer/src/summary/summarize_const_expr.dart';
 
 /**
  * Serialize all the declarations in [compilationUnit] to an unlinked summary.
  */
-UnlinkedUnitBuilder serializeAstUnlinked(CompilationUnit compilationUnit) {
-  return new _SummarizeAstVisitor().serializeCompilationUnit(compilationUnit);
+UnlinkedUnitBuilder serializeAstUnlinked(
+    CompilationUnit compilationUnit, List<int> lineStarts) {
+  return new _SummarizeAstVisitor()
+      .serializeCompilationUnit(compilationUnit, lineStarts);
 }
 
 /**
  * Instances of this class keep track of intermediate state during
  * serialization of a single constant [Expression].
  */
 class _ConstExprSerializer extends AbstractConstExprSerializer {
   final _SummarizeAstVisitor visitor;
 
   /**
@@ skipping 465 matching lines @@
       throw new StateError(
           'Unexpected combinator type: ${combinator.runtimeType}');
     }
     return b;
   }
 
   /**
    * Main entry point for serializing an AST.
    */
   UnlinkedUnitBuilder serializeCompilationUnit(
-      CompilationUnit compilationUnit) {
+      CompilationUnit compilationUnit, List<int> lineStarts) {
     compilationUnit.directives.accept(this);
     if (!hasCoreBeenImported) {
       unlinkedImports.add(new UnlinkedImportBuilder(isImplicit: true));
     }
     compilationUnit.declarations.accept(this);
     UnlinkedUnitBuilder b = new UnlinkedUnitBuilder();
+    b.lineStarts = lineStarts;
     b.libraryName = libraryName;
     b.libraryNameOffset = libraryNameOffset;
     b.libraryNameLength = libraryNameLength;
     b.libraryDocumentationComment = libraryDocumentationComment;
     b.libraryAnnotations = libraryAnnotations;
     b.codeRange = serializeCodeRange(compilationUnit);
     b.classes = classes;
     b.enums = enums;
     b.executables = executables;
     b.exports = exports;
@@ skipping 852 matching lines @@
 /**
  * A [_TypeParameterScope] is a [_Scope] which defines [_ScopedTypeParameter]s.
  */
 class _TypeParameterScope extends _Scope {
   /**
    * Get the number of [_ScopedTypeParameter]s defined in this
    * [_TypeParameterScope].
    */
   int get length => _definedNames.length;
 }