Query directly for cache partition names
https://bugs.webkit.org/show_bug.cgi?id=114538

Reviewed by David Kilzer.

Source/WebKit2:

Call back into WebKitSystemInterface to ask it for the cache
partition names instead of trying to figure them out.

* WebProcess/ResourceCache/WebResourceCacheManager.cpp:
(WebKit::WebResourceCacheManager::getCacheOrigins):
(WebKit):
(WebKit::WebResourceCacheManager::returnCacheOrigins):
* WebProcess/ResourceCache/WebResourceCacheManager.h:
(WebResourceCacheManager):
* WebProcess/ResourceCache/cf/WebResourceCacheManagerCFNet.cpp:
(WebKit::WebResourceCacheManager::cfURLCacheHostNames):
(WebKit):
(WebKit::WebResourceCacheManager::cfURLCacheHostNamesWithCallback):

WebKitLibraries:

* WebKitSystemInterface.h:
* libWebKitSystemInterfaceLion.a:
* libWebKitSystemInterfaceMountainLion.a:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148329 268f45cc-cd09-0410-ab3c-d52691b4dbfc