Fix mac clang build with long long https://bugs.webkit.org/show_bug.cgi?id=111495
Fix mac clang build with long long
https://bugs.webkit.org/show_bug.cgi?id=111495

Unreviewed fix for mac build.

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

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@144849 bbb929c8-8fbe-4397-9dbb-9b2b20218538
axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk