iOS 9 WKWebView support

[xlc]

WebSQL is not supported by WKWebView in iOS 9: https://bugs.webkit.org/show_bug.cgi?id=137760
But IndexedDBShim force to use WebSQL on iOS 9.
Is anyway to make it patch native IndexedDB instead of using WebSQL?

[brettz9]

That is what src/polyfill.js is for (and the file's use within src/setGlobalVars.js). However, I could really use help testing that (once my version 3.0.0 changes are ready) as I have been making many changes which are fixing a number of issues on Chrome and Node but I haven't done any real checking with iOS.

[brettz9]

And as a result, I haven't really been applying improvements made within the shimming code to the (more limited) polyfill code.

[brettz9]

We've abandoned support for polyfill.js which patched bad IndexedDB implementations.

However, if you are just talking about avoiding our code forcing WebSQL, I've added an option, avoidAutoShim to master to do this. Closing as should settle the issue but feel free to reopen if not. Should be added to a new release candidate soon.

[brettz9]

Now added to 3.0.0-rc.4