Purge in-memory localStorage areas if the # of areas exceeds the limit

webkit/dom_storage/dom_storage_cached_area.h

Index: webkit/dom_storage/dom_storage_cached_area.h
diff --git a/webkit/dom_storage/dom_storage_cached_area.h b/webkit/dom_storage/dom_storage_cached_area.h
index ae45a9c20bfd045f86e351a54bde0d60fd5d50ab..63e9dd65fd4ecd1c5e9aa05b6af4a02ac5e34a1e 100644
--- a/webkit/dom_storage/dom_storage_cached_area.h
+++ b/webkit/dom_storage/dom_storage_cached_area.h
@@ -28,7 +28,8 @@ class WEBKIT_STORAGE_EXPORT DomStorageCachedArea :
       public base::RefCounted<DomStorageCachedArea> {
  public:
   DomStorageCachedArea(int64 namespace_id, const GURL& origin,
-                       DomStorageProxy* proxy);
+                       DomStorageProxy* proxy,
+                       int64 storage_size);
 
   int64 namespace_id() const { return namespace_id_; }
   const GURL& origin() const { return origin_; }
@@ -47,6 +48,10 @@ class WEBKIT_STORAGE_EXPORT DomStorageCachedArea :
 
   size_t MemoryBytesUsedByCache() const;
 
+  void set_global_storage_size(int64 size) {
+    global_storage_size_ = size;
+  }
+
  private:
   friend class DomStorageCachedAreaTest;
   friend class base::RefCounted<DomStorageCachedArea>;
@@ -83,6 +88,8 @@ class WEBKIT_STORAGE_EXPORT DomStorageCachedArea :
   scoped_refptr<DomStorageMap> map_;
   scoped_refptr<DomStorageProxy> proxy_;
   base::WeakPtrFactory<DomStorageCachedArea> weak_factory_;
+
+  int64 global_storage_size_;
 };
 
 }  // namespace dom_storage