Big merge from experimental to bleeding edge.

sdk/lib/_internal/compiler/implementation/library_loader.dart

Index: sdk/lib/_internal/compiler/implementation/library_loader.dart
diff --git a/sdk/lib/_internal/compiler/implementation/library_loader.dart b/sdk/lib/_internal/compiler/implementation/library_loader.dart
index 3472b3eb2672d39552ac30775ffc141695e7bdd8..f8befaf443c6cfbd5430a27e6fa50004c8a15de8 100644
--- a/sdk/lib/_internal/compiler/implementation/library_loader.dart
+++ b/sdk/lib/_internal/compiler/implementation/library_loader.dart
@@ -523,7 +523,7 @@ class LibraryDependencyNode {
    */
   void registerInitialExports() {
     pendingExportSet.addAll(
-        library.localScope.values.filter((Element element) {
+        library.localScope.values.where((Element element) {
           // At this point [localScope] only contains members so we don't need
           // to check for foreign or prefix elements.
           return !element.name.isPrivate();
@@ -534,7 +534,7 @@ class LibraryDependencyNode {
    * Registers the compute export scope with the node library.
    */
   void registerExports() {
-    library.setExports(exportScope.values);
+    library.setExports(exportScope.values.toList());
   }
 
   /**