Remove generated directories with 100s of files.

client/html/generated/html/dartium/KeygenElement.dart

Index: client/html/generated/html/dartium/KeygenElement.dart
diff --git a/client/html/generated/html/dartium/KeygenElement.dart b/client/html/generated/html/dartium/KeygenElement.dart
deleted file mode 100644
index 4e576e891d319f9402eb09dcec75cdb30147356a..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/KeygenElement.dart
+++ /dev/null
@@ -1,45 +0,0 @@
-
-class _KeygenElementImpl extends _ElementImpl implements KeygenElement {
-  _KeygenElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  bool get autofocus() => _wrap(_ptr.autofocus);
-
-  void set autofocus(bool value) { _ptr.autofocus = _unwrap(value); }
-
-  String get challenge() => _wrap(_ptr.challenge);
-
-  void set challenge(String value) { _ptr.challenge = _unwrap(value); }
-
-  bool get disabled() => _wrap(_ptr.disabled);
-
-  void set disabled(bool value) { _ptr.disabled = _unwrap(value); }
-
-  FormElement get form() => _wrap(_ptr.form);
-
-  String get keytype() => _wrap(_ptr.keytype);
-
-  void set keytype(String value) { _ptr.keytype = _unwrap(value); }
-
-  NodeList get labels() => _wrap(_ptr.labels);
-
-  String get name() => _wrap(_ptr.name);
-
-  void set name(String value) { _ptr.name = _unwrap(value); }
-
-  String get type() => _wrap(_ptr.type);
-
-  String get validationMessage() => _wrap(_ptr.validationMessage);
-
-  ValidityState get validity() => _wrap(_ptr.validity);
-
-  bool get willValidate() => _wrap(_ptr.willValidate);
-
-  bool checkValidity() {
-    return _wrap(_ptr.checkValidity());
-  }
-
-  void setCustomValidity(String error) {
-    _ptr.setCustomValidity(_unwrap(error));
-    return;
-  }
-}