Remove generated directories with 100s of files.

client/html/generated/html/dartium/MeterElement.dart

Index: client/html/generated/html/dartium/MeterElement.dart
diff --git a/client/html/generated/html/dartium/MeterElement.dart b/client/html/generated/html/dartium/MeterElement.dart
deleted file mode 100644
index bd9e1b042910162454b445429a2cfd579c572827..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/MeterElement.dart
+++ /dev/null
@@ -1,32 +0,0 @@
-
-class _MeterElementImpl extends _ElementImpl implements MeterElement {
-  _MeterElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  FormElement get form() => _wrap(_ptr.form);
-
-  num get high() => _wrap(_ptr.high);
-
-  void set high(num value) { _ptr.high = _unwrap(value); }
-
-  NodeList get labels() => _wrap(_ptr.labels);
-
-  num get low() => _wrap(_ptr.low);
-
-  void set low(num value) { _ptr.low = _unwrap(value); }
-
-  num get max() => _wrap(_ptr.max);
-
-  void set max(num value) { _ptr.max = _unwrap(value); }
-
-  num get min() => _wrap(_ptr.min);
-
-  void set min(num value) { _ptr.min = _unwrap(value); }
-
-  num get optimum() => _wrap(_ptr.optimum);
-
-  void set optimum(num value) { _ptr.optimum = _unwrap(value); }
-
-  num get value() => _wrap(_ptr.value);
-
-  void set value(num value) { _ptr.value = _unwrap(value); }
-}