Implement List<T> operations on dom types via manual mixins.

client/dom/generated/src/frog/MediaList.dart

Index: client/dom/generated/src/frog/MediaList.dart
diff --git a/client/dom/generated/src/frog/MediaList.dart b/client/dom/generated/src/frog/MediaList.dart
index 4a11f8fbb2bb3995ff8b70aaf6a4e37e8d29458c..964a6a4d936d5bf2ef951d769f6f5ab2b51c482e 100644
--- a/client/dom/generated/src/frog/MediaList.dart
+++ b/client/dom/generated/src/frog/MediaList.dart
@@ -7,11 +7,78 @@ class MediaListJs extends DOMTypeJs implements MediaList native "*MediaList" {
 
   void set mediaText(String value) native "this.mediaText = value;";
 
-  String operator[](int index) native;
+  String operator[](int index) native "return this[index];";
 
   void operator[]=(int index, String value) {
     throw new UnsupportedOperationException("Cannot assign element of immutable List.");
   }
+  // -- start List<String> mixins.
+  // String is the element type.
+
+  // From Iterable<String>:
+
+  Iterator<String> iterator() {
+    // Note: NodeLists are not fixed size. And most probably length shouldn't
+    // be cached in both iterator _and_ forEach method. For now caching it
+    // for consistency.
+    return new _FixedSizeListIterator<String>(this);
+  }
+
+  // From Collection<String>:
+
+  void add(String value) {
+    throw new UnsupportedOperationException("Cannot add to immutable List.");
+  }
+
+  void addLast(String value) {
+    throw new UnsupportedOperationException("Cannot add to immutable List.");
+  }
+
+  void addAll(Collection<String> collection) {
+    throw new UnsupportedOperationException("Cannot add to immutable List.");
+  }
+
+  void forEach(void f(String element)) => _Collections.forEach(this, f);
+
+  Collection map(f(String element)) => _Collections.map(this, [], f);
+
+  Collection<String> filter(bool f(String element)) =>
+     _Collections.filter(this, <String>[], f);
+
+  bool every(bool f(String element)) => _Collections.every(this, f);
+
+  bool some(bool f(String element)) => _Collections.some(this, f);
+
+  bool isEmpty() => this.length == 0;
+
+  // From List<String>:
+
+  void sort(int compare(String a, String b)) {
+    throw new UnsupportedOperationException("Cannot sort immutable List.");
+  }
+
+  int indexOf(String element, [int start = 0]) =>
+      _Lists.indexOf(this, element, start, this.length);
+
+  int lastIndexOf(String element, [int start = 0]) =>
+      _Lists.lastIndexOf(this, element, start);
+
+  String last() => this[length - 1];
+
+  // FIXME: implement thesee.
+  void setRange(int start, int length, List<String> from, [int startFrom]) {
+    throw new UnsupportedOperationException("Cannot setRange on immutable List.");
+  }
+  void removeRange(int start, int length) {
+    throw new UnsupportedOperationException("Cannot removeRange on immutable List.");
+  }
+  void insertRange(int start, int length, [String initialValue]) {
+    throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
+  }
+  List<String> getRange(int start, int length) =>
+      _Lists.getRange(this, start, length, <String>[]);
+
+  // -- end List<String> mixins.
 
   void appendMedium(String newMedium) native;