disable broken test until fixing is possible

I don't know a way to make this test work after issue 20143 was "fixed" 
because I'm not able to use the `resizeTo` method anymore. 
Maybe issue 20216 leads to a solution.
> Being consistent in these matters is pretty difficult ;-)

Totally, we got too many languages at once! :-)

> I didn't expect a diff between the JS source and the ported Dart source to be very expressive.

Yeah - it doesn't make much sense when comparing the code, but for some of the examples, the files were 90% HTML and most of that is identical between the JS and the Dart implementation. In those cases we can use difftools to merge the portions of the HTML that are common and then manually port the pieces of code that change.