Fixed WebDragData's wrong dependency.

Source/core/clipboard/DraggedIsolatedFileSystem.h

 /*

[tkent, 2015/02/23 23:40:41]

If this is not a copy of existing file, please use the 3-line copyright header.

[tasak, 2015/02/25 08:15:24]

Done.

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-#ifndef DataTransferItemFileSystem_h
-#define DataTransferItemFileSystem_h
+#ifndef DraggedIsolatedFileSystem_h
+#define DraggedIsolatedFileSystem_h
 
+#include "core/clipboard/DataObject.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/text/WTFString.h"

[tkent, 2015/02/23 23:40:41]

This is unnecessary because this file includes wtf/Forward.h.

[tasak, 2015/02/25 08:15:24]

Done.

 
 namespace blink {
 
-class DataTransferItem;
-class Entry;
-class ExecutionContext;
+class DraggedIsolatedFileSystem {
+    WTF_MAKE_NONCOPYABLE(DraggedIsolatedFileSystem);
+public:
+    DraggedIsolatedFileSystem() { }
+    virtual ~DraggedIsolatedFileSystem() { }
 
-class DataTransferItemFileSystem {
-public:
-    static Entry* webkitGetAsEntry(ExecutionContext*, DataTransferItem&);
+    static void init(void (*)(DataObject*, const String&));

[tkent, 2015/02/23 23:40:41]

I recommend to add |using fileSystemIdPreparationCallback = void
(*)(DataObject&, const String&);|

[tasak, 2015/02/25 08:15:24]

Done.

+    static void prepareForDataObject(DataObject*, const String& filesystemId);
 
 private:
-    DataTransferItemFileSystem();
-    ~DataTransferItemFileSystem();
+    static void (*m_prepareMethod)(DataObject*, const String&);

[tkent, 2015/02/23 23:40:41]

m_prepareMethod -> s_prepareCallback

'method' usually means 'member function'.  This function is not limited to a
member.

[tasak, 2015/02/25 08:15:24]

Done.

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