IndexedDB: Implement create-intermediate-objects semantics when injecting values...

IndexedDB: Implement create-intermediate-objects semantics when injecting values via keyPaths
https://bugs.webkit.org/show_bug.cgi?id=76493

Source/WebCore:

Reviewed by Tony Chang.

Tests: storage/indexeddb/objectstore-autoincrement.html

* bindings/v8/IDBBindingUtilities.cpp:
(WebCore::injectIDBKeyIntoSerializedValue):

LayoutTests:

Per discussion on public-webapps, when injecting a key into a value, create intermediate
objects if necessary.

Reviewed by Tony Chang.

* storage/indexeddb/objectstore-autoincrement-expected.txt:
* storage/indexeddb/objectstore-autoincrement.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105331 268f45cc-cd09-0410-ab3c-d52691b4dbfc