Update IDBDatabase interface

http://www.w3.org/TR/IndexedDB/#database-interface

Author: falsandtru

inputfiles/browser.webidl.xml

@@ -4420,7 +4420,7 @@
         <property name="objectStoreNames" read-only="1" type="DOMStringList" />
         <property event-handler="abort" name="onabort" type="EventHandler" />
         <property event-handler="error" name="onerror" type="EventHandler" />
-        <property name="version" read-only="1" type="DOMString" />
+        <property name="version" read-only="1" type="unsigned long long" />
       </properties>
     </interface>
     <interface extends="Object" name="IDBFactory">
@@ -10878,4 +10878,4 @@
     <typedef new-type="KeyType" type="DOMString" />
     <typedef new-type="KeyUsage" type="DOMString" />
   </typedefs>
-</webidl-xml>
+</webidl-xml>