Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/html/generated/html/dartium/WebGLContextAttributes.dart

+
+class _WebGLContextAttributesImpl extends _DOMTypeBase implements WebGLContextAttributes {
+  _WebGLContextAttributesImpl._wrap(ptr) : super._wrap(ptr);
+
+  bool get alpha() => _wrap(_ptr.alpha);
+
+  void set alpha(bool value) { _ptr.alpha = _unwrap(value); }
+
+  bool get antialias() => _wrap(_ptr.antialias);
+
+  void set antialias(bool value) { _ptr.antialias = _unwrap(value); }
+
+  bool get depth() => _wrap(_ptr.depth);
+
+  void set depth(bool value) { _ptr.depth = _unwrap(value); }
+
+  bool get premultipliedAlpha() => _wrap(_ptr.premultipliedAlpha);
+
+  void set premultipliedAlpha(bool value) { _ptr.premultipliedAlpha = _unwrap(value); }
+
+  bool get preserveDrawingBuffer() => _wrap(_ptr.preserveDrawingBuffer);
+
+  void set preserveDrawingBuffer(bool value) { _ptr.preserveDrawingBuffer = _unwrap(value); }
+
+  bool get stencil() => _wrap(_ptr.stencil);
+
+  void set stencil(bool value) { _ptr.stencil = _unwrap(value); }
+}