Make filesystem objects ScriptWrappable.

Source/modules/filesystem/DOMFileSystem.h

Index: Source/modules/filesystem/DOMFileSystem.h
diff --git a/Source/modules/filesystem/DOMFileSystem.h b/Source/modules/filesystem/DOMFileSystem.h
index 05e62559bfec5fdf29df5cfe120145747c51e921..e66c762f926a7ffb1eb81b5ff8a2c9ee5bee29d2 100644
--- a/Source/modules/filesystem/DOMFileSystem.h
+++ b/Source/modules/filesystem/DOMFileSystem.h
@@ -31,6 +31,7 @@
 #ifndef DOMFileSystem_h
 #define DOMFileSystem_h
 
+#include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ScriptExecutionContext.h"
 #include "modules/filesystem/DOMFileSystemBase.h"
@@ -43,7 +44,7 @@ class FileCallback;
 class FileEntry;
 class FileWriterCallback;
 
-class DOMFileSystem : public DOMFileSystemBase, public ActiveDOMObject {
+class DOMFileSystem : public DOMFileSystemBase, public ActiveDOMObject, public ScriptWrappable {

[abarth-chromium, 2013/05/14 00:38:13]

Usually we put ScriptWrappable next to the RefCounted base class.  Is that
hidden in DOMFileSystemBase?  Should the ScriptWrappable go there?

[Tom Sepez, 2013/05/14 18:21:51]

DOMFileSystemBase is the refcount'ed class.  But since there isn't a
DOMFileSytemBase.idl, I'm not comfortable about making it a ScriptWrappable --
as in calling ScriptWrappable::init() from a DOMFileSystemBase class won't work
because there isn't a matching wrapper via the idl generation. So I'll swap
ScriptWrappable and ActiveDOMObject.

 public:
     static PassRefPtr<DOMFileSystem> create(ScriptExecutionContext*, const String& name, FileSystemType, const KURL& rootURL, PassOwnPtr<AsyncFileSystem>);