Delete ApplicationCache static member functions

Delete ApplicationCache static member functions
https://bugs.webkit.org/show_bug.cgi?id=143534

Reviewed by Tim Horton.

Source/WebCore:

* loader/appcache/ApplicationCache.cpp:
(WebCore::ApplicationCache::deleteCacheForOrigin): Deleted.
(WebCore::ApplicationCache::deleteAllCaches): Deleted.
(WebCore::ApplicationCache::diskUsageForOrigin): Deleted.
* loader/appcache/ApplicationCache.h:

Source/WebKit2:

* WebProcess/ApplicationCache/WebApplicationCacheManager.cpp:
(WebKit::WebApplicationCacheManager::deleteEntriesForOrigin):
(WebKit::WebApplicationCacheManager::deleteAllEntries):
* WebProcess/InjectedBundle/InjectedBundle.cpp:
(WebKit::InjectedBundle::clearApplicationCacheForOrigin):
(WebKit::InjectedBundle::appCacheUsageForOrigin):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@182565 268f45cc-cd09-0410-ab3c-d52691b4dbfc