Null diff to AST based version of finishClasses.

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

Index: dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
index 8957fef843c392eca2d9b9e87cd3b894910b772a..b49617456686a89beb636766260648e9ab569914 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
@@ -289,14 +289,16 @@ function(collectedClasses) {
       in the format Super;field1,field2 from the null-string property on the
       descriptor. */'''
       var fields = desc[''], supr;
-      if (typeof fields == 'string') {
-        var s = fields.split(';'); supr = s[0];
-        fields = s[1] == '' ? [] : s[1].split(',');
+      if (typeof fields == "string") {
+        var s = fields.split(";");
+        supr = s[0];
+        fields = s[1] == "" ? [] : s[1].split(",");
       } else {
-        supr = desc['super'];
+        supr = desc.super;
       }
       $isolatePropertiesName[cls] = $defineClassName(cls, fields, desc);
-      if (supr) $pendingClassesName[cls] = supr;
+      if (supr)
+        $pendingClassesName[cls] = supr;
     }
   }
   var pendingClasses = $pendingClassesName;
@@ -308,11 +310,13 @@ function(collectedClasses) {
 '''/* Opera does not support 'getOwnPropertyNames'. Therefore we use
       hasOwnProperty instead. */'''
     var hasOwnProperty = Object.prototype.hasOwnProperty;
-    if (hasOwnProperty.call(finishedClasses, cls)) return;
+    if (hasOwnProperty.call(finishedClasses, cls))
+      return;
     finishedClasses[cls] = true;
     var superclass = pendingClasses[cls];
 '''/* The superclass is only false (empty string) for Dart's Object class. */'''
-    if (!superclass) return;
+    if (!superclass)
+      return;
     finishClass(superclass);
     var constructor = $isolatePropertiesName[cls];
     var superConstructor = $isolatePropertiesName[superclass];
@@ -321,20 +325,25 @@ function(collectedClasses) {
       prototype.__proto__ = superConstructor.prototype;
       prototype.constructor = constructor;
     } else {
-      function tmp() {};
+      function tmp() {
+      }
       tmp.prototype = superConstructor.prototype;
       var newPrototype = new tmp();
       constructor.prototype = newPrototype;
       newPrototype.constructor = constructor;
       for (var member in prototype) {
-        if (!member) continue;  '''/* Short version of: if (member == '') */'''
+        if (!member)
+          continue;'''/* Short version of: if (member == '') */'''
+
         if (hasOwnProperty.call(prototype, member)) {
           newPrototype[member] = prototype[member];
         }
       }
     }
   }
-  for (var cls in pendingClasses) finishClass(cls);
+  for (var cls in pendingClasses) {
+    finishClass(cls);
+  }
 }''';
   }