Make WebLocalizableStrings work a little more like the Mac version

     Make WebLocalizableStrings work a little more like the Mac version

         Reviewed by Steve.

         * WebKit.vcproj/WebKit.def: Deprecated SetWebLocalizedStringMainBundle.
         * WebKit.vcproj/WebKit_debug.def: Ditto.
         * WebLocalizableStrings.cpp:
         (createWebKitBundle): Changed to only create the bundle once.
         (cfBundleForStringsBundle): Added. Code was factored out of
         copyLocalizedStringFromBundle. We now use the CFBundleGetMainBundle to
         get the main bundle and WebLocalizableStringsBundle's identifier to
         fetch the framework's bundle.
         (copyLocalizedStringFromBundle): Changed to call
         cfBundleForStringsBundle.
         (cacheString): Cleaned up logic a bit with an early return.
         (SetWebLocalizedStringMainBundle): Moved down with the other
         deprecated functions and made into a no-op.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@28582 268f45cc-cd09-0410-ab3c-d52691b4dbfc