Add List.insert.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index fdd1df8b008e77ef5a4ea6cd91f3eab296d4a3ff..e2c674ad0c73f0d10b268e5d48a8a2e862cc34a3 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -7321,6 +7321,10 @@ class DomMimeTypeArray implements JavaScriptIndexingBehavior, List<DomMimeType>
   DomMimeType max([int compare(DomMimeType a, DomMimeType b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, DomMimeType element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   DomMimeType removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -7580,6 +7584,10 @@ class DomPluginArray implements JavaScriptIndexingBehavior, List<DomPlugin> nati
   DomPlugin max([int compare(DomPlugin a, DomPlugin b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, DomPlugin element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   DomPlugin removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -7946,6 +7954,10 @@ class DomStringList implements JavaScriptIndexingBehavior, List<String> native "
   String max([int compare(String a, String b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, String element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   String removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -8254,6 +8266,17 @@ class _ChildrenElementList implements List {
     return Lists.lastIndexOf(this, element, start);
   }
 
+  void insert(int index, Element element) {
+    if (index < 0 || index > length) {
+      throw new RangeError.range(index, 0, length);
+    }
+    if (index == length) {
+      _element.$dom_appendChild(element);
+    } else {
+      throw new UnimplementedError("insert on ElementLists");
+    }
+  }
+
   void clear() {
     // It is unclear if we want to keep non element nodes?
     _element.text = '';
@@ -11006,6 +11029,10 @@ class FileList implements JavaScriptIndexingBehavior, List<File> native "*FileLi
   File max([int compare(File a, File b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, File element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   File removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -11568,6 +11595,10 @@ class Float32Array extends ArrayBufferView implements JavaScriptIndexingBehavior
   num max([int compare(num a, num b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, num element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   num removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -11789,6 +11820,10 @@ class Float64Array extends ArrayBufferView implements JavaScriptIndexingBehavior
   num max([int compare(num a, num b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, num element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   num removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -12430,6 +12465,10 @@ class HtmlAllCollection implements JavaScriptIndexingBehavior, List<Node> native
   Node max([int compare(Node a, Node b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Node element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Node removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -12642,6 +12681,10 @@ class HtmlCollection implements JavaScriptIndexingBehavior, List<Node> native "*
   Node max([int compare(Node a, Node b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Node element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Node removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -14637,6 +14680,10 @@ class Int16Array extends ArrayBufferView implements JavaScriptIndexingBehavior,
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -14858,6 +14905,10 @@ class Int32Array extends ArrayBufferView implements JavaScriptIndexingBehavior,
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -15079,6 +15130,10 @@ class Int8Array extends ArrayBufferView implements JavaScriptIndexingBehavior, L
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -17442,6 +17497,17 @@ class _ChildNodeListLazy implements List {
     }
   }
 
+  void insert(int index, Node node) {
+    if (index < 0 || index > length) {
+      throw new RangeError.range(index, 0, length);
+    }
+    if (index == length) {
+      _this.$dom_appendChild(node);
+    } else {
+      this_.insertBefore(node, this[index]);
+    }
+  }
+
   Node removeLast() {
     final result = last;
     if (result != null) {
@@ -18030,6 +18096,10 @@ class NodeList implements JavaScriptIndexingBehavior, List<Node> native "*NodeLi
   Node max([int compare(Node a, Node b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Node element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Node removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -20429,6 +20499,10 @@ class SourceBufferList extends EventTarget implements JavaScriptIndexingBehavior
   SourceBuffer max([int compare(SourceBuffer a, SourceBuffer b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, SourceBuffer element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   SourceBuffer removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -20714,6 +20788,10 @@ class SpeechGrammarList implements JavaScriptIndexingBehavior, List<SpeechGramma
   SpeechGrammar max([int compare(SpeechGrammar a, SpeechGrammar b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, SpeechGrammar element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   SpeechGrammar removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -22121,6 +22199,10 @@ class TextTrackCueList implements List<TextTrackCue>, JavaScriptIndexingBehavior
   TextTrackCue max([int compare(TextTrackCue a, TextTrackCue b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, TextTrackCue element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   TextTrackCue removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -22331,6 +22413,10 @@ class TextTrackList extends EventTarget implements JavaScriptIndexingBehavior, L
   TextTrack max([int compare(TextTrack a, TextTrack b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, TextTrack element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   TextTrack removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -22767,6 +22853,10 @@ class TouchList implements JavaScriptIndexingBehavior, List<Touch> native "*Touc
   Touch max([int compare(Touch a, Touch b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Touch element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Touch removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -23240,6 +23330,10 @@ class Uint16Array extends ArrayBufferView implements JavaScriptIndexingBehavior,
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -23461,6 +23555,10 @@ class Uint32Array extends ArrayBufferView implements JavaScriptIndexingBehavior,
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -23682,6 +23780,10 @@ class Uint8Array extends ArrayBufferView implements JavaScriptIndexingBehavior,
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -23900,6 +24002,10 @@ class Uint8ClampedArray extends Uint8Array implements JavaScriptIndexingBehavior
   int max([int compare(int a, int b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, int element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   int removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -27797,6 +27903,10 @@ class _ClientRectList implements JavaScriptIndexingBehavior, List<Rect> native "
   Rect max([int compare(Rect a, Rect b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Rect element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Rect removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -27999,6 +28109,10 @@ class _CssRuleList implements JavaScriptIndexingBehavior, List<CssRule> native "
   CssRule max([int compare(CssRule a, CssRule b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, CssRule element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   CssRule removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -28201,6 +28315,10 @@ class _CssValueList extends CssValue implements List<CssValue>, JavaScriptIndexi
   CssValue max([int compare(CssValue a, CssValue b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, CssValue element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   CssValue removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -28403,6 +28521,10 @@ class _EntryArray implements JavaScriptIndexingBehavior, List<Entry> native "*En
   Entry max([int compare(Entry a, Entry b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Entry element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Entry removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -28605,6 +28727,10 @@ class _EntryArraySync implements JavaScriptIndexingBehavior, List<EntrySync> nat
   EntrySync max([int compare(EntrySync a, EntrySync b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, EntrySync element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   EntrySync removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -28807,6 +28933,10 @@ class _GamepadList implements JavaScriptIndexingBehavior, List<Gamepad> native "
   Gamepad max([int compare(Gamepad a, Gamepad b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Gamepad element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Gamepad removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -29072,6 +29202,10 @@ class _NamedNodeMap implements JavaScriptIndexingBehavior, List<Node> native "*N
   Node max([int compare(Node a, Node b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Node element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Node removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -29298,6 +29432,10 @@ class _SpeechInputResultList implements JavaScriptIndexingBehavior, List<SpeechI
   SpeechInputResult max([int compare(SpeechInputResult a, SpeechInputResult b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, SpeechInputResult element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   SpeechInputResult removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -29500,6 +29638,10 @@ class _SpeechRecognitionResultList implements JavaScriptIndexingBehavior, List<S
   SpeechRecognitionResult max([int compare(SpeechRecognitionResult a, SpeechRecognitionResult b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, SpeechRecognitionResult element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   SpeechRecognitionResult removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -29702,6 +29844,10 @@ class _StyleSheetList implements JavaScriptIndexingBehavior, List<StyleSheet> na
   StyleSheet max([int compare(StyleSheet a, StyleSheet b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, StyleSheet element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   StyleSheet removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
@@ -32624,6 +32770,8 @@ class _WrappedList<E> implements List<E> {
 
   int lastIndexOf(E element, [int start]) => _list.lastIndexOf(element, start);
 
+  void insert(int index, E element) => _list.insert(index, element);
+
   E removeAt(int index) => _list.removeAt(index);
 
   E removeLast() => _list.removeLast();