Remove modules/filesystem/DraggedIsolatedFileSystem.h dependency from core/DEPS.

Source/web/WebDragData.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 146 matching lines @@
             fileMetadata.length = item.fileSystemFileSize;
             m_private->add(File::createForFileSystemFile(item.fileSystemURL, fileMetadata));
         }
         return;
     }
 }
 
 WebString WebDragData::filesystemId() const
 {
     ASSERT(!isNull());
-    DraggedIsolatedFileSystem* filesystem = DraggedIsolatedFileSystem::from(m_private.get());
-    if (filesystem)
-        return filesystem->filesystemId();
-    return WebString();
+    return m_private.get()->filesystemId();
 }
 
 void WebDragData::setFilesystemId(const WebString& filesystemId)
 {
     // The ID is an opaque string, given by and validated by chromium port.
     ensureMutable();
-    DraggedIsolatedFileSystem::provideTo(*m_private.get(), DraggedIsolatedFileSystem::supplementName(), DraggedIsolatedFileSystem::create(filesystemId));
+    DraggedIsolatedFileSystem::provideTo(*m_private.get(), DraggedIsolatedFileSystem::supplementName(), DraggedIsolatedFileSystem::create(*m_private.get(), filesystemId));
 }
 
 } // namespace blink