Add a stubbed out method for clearing out the website data store
Created attachment 242822 [details]
Attachment 242822 [details] did not pass style-queue:
ERROR: Source/WebKit2/UIProcess/API/Cocoa/_WKWebsiteDataStore.h:32: Place brace on its own line for function definitions. [whitespace/braces] 
Total errors found: 1 in 6 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Committed r176951: <http://trac.webkit.org/changeset/176951>