Here is the difference in the generated JS. From a ~10/2013 trunk build:
function com_google_gwt_dom_client_StyleInjector_StyleInjectorImpl(){
switch (permutationId) {
case 1:
case 2:
case 3:
return new StyleInjector$StyleInjectorImplIE_0;
}
return new
In CrossSiteIframeTemplate.js this is handled by assigning
__MODULE_FUNC__.__softPermutationId to 0 to begin with, and then only
change that value if : was present in the permutation string. I'm not
seeing any other js files that init __softPermutationId to 0, and only
permutations.js assigns
and only permutations.js assigns it to another value (but does so
conditionally, so it never *assigns* undefined to
__softPermutationId, it just leaves it not defined).
But line 61:
https://gwt.googlesource.com/gwt/+/master/dev/core/src/com/google/gwt/core/ext/linker/impl/permutations.js
