Derive source information from ResolvedAst.

pkg/compiler/lib/src/io/source_information.dart

Index: pkg/compiler/lib/src/io/source_information.dart
diff --git a/pkg/compiler/lib/src/io/source_information.dart b/pkg/compiler/lib/src/io/source_information.dart
index 0f6bbace841c906db35d20d054cee16bdb28cf79..cf3872cd0e35f229c23db196461c2f062247b6ad 100644
--- a/pkg/compiler/lib/src/io/source_information.dart
+++ b/pkg/compiler/lib/src/io/source_information.dart
@@ -5,7 +5,7 @@
 library dart2js.source_information;
 
 import '../common.dart';
-import '../elements/elements.dart' show AstElement, LocalElement;
+import '../elements/elements.dart' show AstElement, LocalElement, ResolvedAst;
 import '../js/js.dart' show JavaScriptNodeSourceInformation;
 import '../tree/tree.dart' show Node;
 import 'source_file.dart';
@@ -56,8 +56,9 @@ class SourceInformationBuilder {
   /// Create a [SourceInformationBuilder] for [element].
   SourceInformationBuilder forContext(AstElement element) => this;
 
-  /// Generate [SourceInformation] the declaration of [element].
-  SourceInformation buildDeclaration(AstElement element) => null;
+  /// Generate [SourceInformation] the declaration of the element in
+  /// [resolvedAst].
+  SourceInformation buildDeclaration(ResolvedAst resolvedAst) => null;
 
   /// Generate [SourceInformation] for the generic [node].
   @deprecated