Remove collection-dev from the html and js-helper library.

sdk/lib/html/html_common/filtered_element_list.dart

Index: sdk/lib/html/html_common/filtered_element_list.dart
diff --git a/sdk/lib/html/html_common/filtered_element_list.dart b/sdk/lib/html/html_common/filtered_element_list.dart
index 44768c4fcacfe18698896ff9e4e59a48f3d16fcc..1c76f00ba8bf41279716fd860332085de9a380c5 100644
--- a/sdk/lib/html/html_common/filtered_element_list.dart
+++ b/sdk/lib/html/html_common/filtered_element_list.dart
@@ -176,20 +176,20 @@ class FilteredElementList implements List {
     return _filtered.lastIndexOf(element, start);
   }
 
-  Iterable<Element> take(int n) {
-    return new TakeIterable<Element>(this, n);
+  List<Element> take(int n) {
+    return IterableMixinWorkaround.takeList(this, n);
   }
 
   Iterable<Element> takeWhile(bool test(Element value)) {
-    return new TakeWhileIterable<Element>(this, test);
+    return IterableMixinWorkaround.takeWhile(this, test);
   }
 
-  Iterable<Element> skip(int n) {
-    return new SkipIterable<Element>(this, n);
+  List<Element> skip(int n) {
+    return IterableMixinWorkaround.skipList(this, n);
   }
 
   Iterable<Element> skipWhile(bool test(Element value)) {
-    return new SkipWhileIterable<Element>(this, test);
+    return IterableMixinWorkaround.skipWhile(this, test);
   }
 
   Element get first => _filtered.first;