Base JavaScript code position computation on JavaScript tracer.

pkg/compiler/lib/src/js_emitter/metadata_collector.dart

 // Copyright (c) 2013, 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.
 
 part of dart2js.js_emitter;
 
 /// Represents an entry's position in one of the global metadata arrays.
 ///
 /// [_rc] is used to count the number of references of the token in the
 /// ast for a program.
@@ skipping 211 matching lines @@
   jsAst.Expression reifyExpression(jsAst.Expression expression) {
     return _addGlobalMetadata(expression);
   }
 
   Placeholder getMetadataPlaceholder([debug]) {
     return new _ForwardingMetadataEntry(debug);
   }
 
   _MetadataEntry _addGlobalMetadata(jsAst.Node node) {
     String nameToKey(jsAst.Name name) => "${name.key}";
-    String printed = jsAst.prettyPrint(node, _compiler,
-                                       renamerForNames: nameToKey)
-                          .getText();
+    String printed = jsAst.prettyPrint(
+        node, _compiler, renamerForNames: nameToKey);
     return _globalMetadataMap.putIfAbsent(printed, () {
       _BoundMetadataEntry result = new _BoundMetadataEntry(node);
       if (_compiler.hasIncrementalSupport) {
         result.finalize(_globalMetadataCounter++);
       }
       return result;
     });
   }
 
   jsAst.Expression _computeTypeRepresentation(DartType type,
@@ skipping 115 matching lines @@
     if (token is _ForwardingMetadataEntry && !token.isBound) {
       _foundUnboundToken = true;
     }
   }
 
   bool findUnboundPlaceholders(jsAst.Node node) {
     node.accept(this);
     return _foundUnboundToken;
   }
 }