Big merge from experimental to bleeding edge.

sdk/lib/_internal/compiler/implementation/elements/elements.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.
 
 library elements;
 
 import 'dart:uri';
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 import '../../compiler.dart' as api_e;
@@ skipping 2022 matching lines @@
     Token positionB = b.position();
     int r = positionA.charOffset.compareTo(positionB.charOffset);
     if (r != 0) return r;
     r = a.name.slowToString().compareTo(b.name.slowToString());
     if (r != 0) return r;
     // Same file, position and name.  If this happens, we should find out why
     // and make the order total and independent of hashCode.
     return a.hashCode.compareTo(b.hashCode);
   }
 
-  static List<Element> sortedByPosition(Collection<Element> elements) {
-    return new List<Element>.from(elements)..sort(compareByPosition);
+  static List<Element> sortedByPosition(Iterable<Element> elements) {
+    return elements.toList()..sort(compareByPosition);
   }
 }
 
 class LabelElement extends Element {
   // We store the original label here so it can be returned by [parseNode].
   final Label label;
   final String labelName;
   final TargetElement target;
   bool isBreakTarget = false;
   bool isContinueTarget = false;
@@ skipping 115 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }