Implement ClassMirror.owner and LibraryMirror.uri.

dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

 // Copyright (c) 2012, 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 js_backend;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 3015 matching lines @@
         emitDeferredPreambleWhenEmpty(deferredBuffer);
         deferredBuffer.add('\$\$$_=$_{};$n');
 
         deferredBuffer
             ..write(REFLECTION_DATA_PARSER)
             ..write('([$n');
         var sortedLibraries = Elements.sortedByPosition(libraryBuffers.keys);
         for (LibraryElement library in sortedLibraries) {
           List<CodeBuffer> buffers = libraryBuffers[library];
           var buffer = buffers[0];
+          var uri = library.canonicalUri;
+          if (uri.scheme == 'file' && compiler.sourceMapUri != null) {
+            // TODO(ahe): It is a hack to use compiler.sourceMapUri
+            // here.  It should be relative to the main JavaScript
+            // output file.
+            uri = relativize(
+                compiler.sourceMapUri, library.canonicalUri, false);
+          }
           if (buffer != null) {
             mainBuffer
-                ..write('["${library.getLibraryOrScriptName()}",$_{$n')
+                ..write('["${library.getLibraryOrScriptName()}",$_')
+                ..write('"${uri}",$_')
+                ..write('{$n')
                 ..addBuffer(buffer)
                 ..write('}],$n');
           }
           buffer = buffers[1];
           if (buffer != null) {
             deferredBuffer
-                ..write('["${library.getLibraryOrScriptName()}",$_{$n')
+                ..write('["${library.getLibraryOrScriptName()}",$_')
+                ..write('"${uri}",$_')
+                ..write('{$n')
                 ..addBuffer(buffer)
                 ..write('}],$n');
           }
           libraryBuffers[library] = const [];
         }
         mainBuffer.write('])$N');
 
         deferredBuffer.write('])$N');
         if (!deferredClasses.isEmpty) {
           deferredBuffer.add('$finishClassesName(\$\$,'
@@ skipping 164 matching lines @@
 // TODO(ahe): The uri field below is fake.
 const String REFLECTION_DATA_PARSER = r'''
 (function (reflectionData) {
   if (!init.libraries) init.libraries = [];
   var libraries = init.libraries;
   var hasOwnProperty = Object.prototype.hasOwnProperty;
   var length = reflectionData.length;
   for (var i = 0; i < length; i++) {
     var data = reflectionData[i];
     var name = data[0];
-    var descriptor = data[1];
+    var uri = data[1];
+    var descriptor = data[2];
     var classes = [];
     var functions = [];
     for (var property in descriptor) {
       if (!hasOwnProperty.call(descriptor, property)) continue;
       var element = descriptor[property];
       if (typeof element === "function") {
         $[property] = element;
         functions.push(property);
       } else {
         $$[property] = element;
         classes.push(property);
         classes.push(element[""]);
       }
     }
-    var uri = ".../library" + i + ".dart";
     libraries.push([name, uri, classes, functions]);
   }
 })''';