Make List.skip, List.take and List.reversed return Iterables, not Lists.

sdk/lib/svg/dart2js/svg_dart2js.dart

Index: sdk/lib/svg/dart2js/svg_dart2js.dart
diff --git a/sdk/lib/svg/dart2js/svg_dart2js.dart b/sdk/lib/svg/dart2js/svg_dart2js.dart
index 9f477212217cfb51422e0b2dcd3252994d504896..1a7006008cd75fc28675f85a848d24c851b5a0e9 100644
--- a/sdk/lib/svg/dart2js/svg_dart2js.dart
+++ b/sdk/lib/svg/dart2js/svg_dart2js.dart
@@ -3278,7 +3278,7 @@ class LengthList implements JavaScriptIndexingBehavior, List<Length> native "*SV
 
   // clear() defined by IDL.
 
-  List<Length> get reversed {
+  Iterable<Length> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }
 
@@ -3905,7 +3905,7 @@ class NumberList implements JavaScriptIndexingBehavior, List<Number> native "*SV
 
   // clear() defined by IDL.
 
-  List<Number> get reversed {
+  Iterable<Number> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }
 
@@ -4808,7 +4808,7 @@ class PathSegList implements JavaScriptIndexingBehavior, List<PathSeg> native "*
 
   // clear() defined by IDL.
 
-  List<PathSeg> get reversed {
+  Iterable<PathSeg> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }
 
@@ -5695,7 +5695,7 @@ class StringList implements JavaScriptIndexingBehavior, List<String> native "*SV
 
   // clear() defined by IDL.
 
-  List<String> get reversed {
+  Iterable<String> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }
 
@@ -6861,7 +6861,7 @@ class TransformList implements List<Transform>, JavaScriptIndexingBehavior nativ
 
   // clear() defined by IDL.
 
-  List<Transform> get reversed {
+  Iterable<Transform> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }
 
@@ -7383,7 +7383,7 @@ class _ElementInstanceList implements JavaScriptIndexingBehavior, List<ElementIn
     throw new UnsupportedError("Cannot clear immutable List.");
   }
 
-  List<ElementInstance> get reversed {
+  Iterable<ElementInstance> get reversed {
     return IterableMixinWorkaround.reversedList(this);
   }