Fixed WebDragData's wrong dependency.

Source/core/clipboard/DraggedIsolatedFileSystem.h

Index: Source/core/clipboard/DraggedIsolatedFileSystem.h
diff --git a/Source/core/clipboard/DraggedIsolatedFileSystem.h b/Source/core/clipboard/DraggedIsolatedFileSystem.h
new file mode 100644
index 0000000000000000000000000000000000000000..7980b9e4ec34f80dcd5e07b09a448c3ca375e34e
--- /dev/null
+++ b/Source/core/clipboard/DraggedIsolatedFileSystem.h
@@ -0,0 +1,32 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DraggedIsolatedFileSystem_h
+#define DraggedIsolatedFileSystem_h
+
+#include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
+
+namespace blink {
+
+class DataObject;
+
+class DraggedIsolatedFileSystem {
+    WTF_MAKE_NONCOPYABLE(DraggedIsolatedFileSystem);
+public:
+    DraggedIsolatedFileSystem() { }
+    virtual ~DraggedIsolatedFileSystem() { }
+
+    using fileSystemIdPreparationCallback = void(*)(DataObject*, const String&);

[tkent, 2015/02/25 08:27:17]

fileSystem -> FileSystem
A type name should start with a capital letter.  My suggestion was wrong :-)

[tasak, 2015/02/26 11:27:47]

Done.

+    static void init(fileSystemIdPreparationCallback);
+
+    static void prepareForDataObject(DataObject*, const String& filesystemId);
+
+private:
+    static fileSystemIdPreparationCallback m_prepareCallback;

[tkent, 2015/02/25 08:27:17]

m_prepareCallback -> s_prepareCallback

[tasak, 2015/02/26 11:27:47]

Done.

+};
+
+} // namespace blink
+
+#endif // DraggedIsolatedFileSystem_h