Fixed WebDragData's wrong dependency.

Source/modules/InitModules.cpp

Index: Source/modules/InitModules.cpp
diff --git a/Source/modules/InitModules.cpp b/Source/modules/InitModules.cpp
index 9907bfe3cee3118361e957d0a93e91b7ff29f7d3..1cfa4148a3228f97f24be8da134577da668228f6 100644
--- a/Source/modules/InitModules.cpp
+++ b/Source/modules/InitModules.cpp
@@ -13,6 +13,7 @@
 #include "modules/EventTargetModulesNames.h"
 #include "modules/IndexedDBNames.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
+#include "modules/filesystem/DraggedIsolatedFileSystemImpl.h"
 #include "modules/webdatabase/DatabaseManager.h"
 
 namespace blink {
@@ -28,6 +29,7 @@ void ModulesInitializer::init()
     ModuleBindingsInitializer::init();
     IndexedDBNames::init();
     AXObjectCache::init(AXObjectCacheImpl::create);
+    DraggedIsolatedFileSystem::init(DraggedIsolatedFileSystemImpl::prepareForDataObject);
 
     CoreInitializer::init();