IndexedDB: Record attemps to open a path with non-ascii characters
https://bugs.webkit.org/show_bug.cgi?id=112224

Reviewed by Tony Chang.

We want to see if that's correlated with errors on open.

No new tests, there's no way to test histogramming that I know of. I
ran chrome locally with a non ascii path though.

* Modules/indexeddb/IDBBackingStore.cpp:
(WebCore::IDBBackingStore::open):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145760 268f45cc-cd09-0410-ab3c-d52691b4dbfc