Quota support.

webkit/api/public/WebStorageNamespace.h

Index: webkit/api/public/WebStorageNamespace.h
===================================================================
--- webkit/api/public/WebStorageNamespace.h	(revision 27909)
+++ webkit/api/public/WebStorageNamespace.h	(working copy)
@@ -46,9 +46,11 @@
         // where the SQLite databases that make LocalStorage data persistent are located.
         // If path is empty, data will not persist. You should call delete on the returned
         // object when you're finished.
-        WEBKIT_API static WebStorageNamespace* createLocalStorageNamespace(const WebString& backingDirectoryPath);
+        WEBKIT_API static WebStorageNamespace* createLocalStorageNamespace(const WebString& backingDirectoryPath, unsigned quota);
         WEBKIT_API static WebStorageNamespace* createSessionStorageNamespace();
 
+        static const unsigned noQuota = UINT_MAX;
+
         virtual ~WebStorageNamespace() { }
 
         // Create a new WebStorageArea object. Two subsequent calls with the same origin