Pass implementation object to supplemental classes by reference

Source/modules/filesystem/DOMWindowFileSystem.h

Index: Source/modules/filesystem/DOMWindowFileSystem.h
diff --git a/Source/modules/filesystem/DOMWindowFileSystem.h b/Source/modules/filesystem/DOMWindowFileSystem.h
index eb0a76068d6cf30991d0716d415c311d467a5a04..96488760239cce1467ea84fce1b7f4a0390586cd 100644
--- a/Source/modules/filesystem/DOMWindowFileSystem.h
+++ b/Source/modules/filesystem/DOMWindowFileSystem.h
@@ -38,8 +38,8 @@ class FileSystemCallback;
 
 class DOMWindowFileSystem {
 public:
-    static void webkitRequestFileSystem(DOMWindow*, int type, long long size, PassOwnPtr<FileSystemCallback>, PassOwnPtr<ErrorCallback>);
-    static void webkitResolveLocalFileSystemURL(DOMWindow*, const String&, PassOwnPtr<EntryCallback>, PassOwnPtr<ErrorCallback>);
+    static void webkitRequestFileSystem(DOMWindow&, int type, long long size, PassOwnPtr<FileSystemCallback>, PassOwnPtr<ErrorCallback>);
+    static void webkitResolveLocalFileSystemURL(DOMWindow&, const String&, PassOwnPtr<EntryCallback>, PassOwnPtr<ErrorCallback>);
 
     // They are placed here and in all capital letters so they can be checked against the constants in the
     // IDL at compile time.