Move DragCaretController class to its own file

Source/core/editing/DragCaretController.h

Index: Source/core/editing/DragCaretController.h
diff --git a/Source/modules/filesystem/WorkerGlobalScopeFileSystem.h b/Source/core/editing/DragCaretController.h
similarity index 54%
copy from Source/modules/filesystem/WorkerGlobalScopeFileSystem.h
copy to Source/core/editing/DragCaretController.h
index 84a0d0f875dba8b3658f0194dfa2a514600d7f8b..c48c8046b704cee3b8972ed7aa6cc7c077fa4718 100644
--- a/Source/modules/filesystem/WorkerGlobalScopeFileSystem.h
+++ b/Source/core/editing/DragCaretController.h
@@ -1,5 +1,5 @@
 /*

[tkent, 2015/07/13 08:20:53]

Couldn't you find --similarity= value so that this inherits from Caret.h
correctly?

[yosin_UTC9, 2015/07/13 12:20:06]

It seems --similarity doesn't help this.
I commited file copy CL, http://crrev.com/1235833002

- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -21,41 +21,42 @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
  */
 
-#ifndef WorkerGlobalScopeFileSystem_h
-#define WorkerGlobalScopeFileSystem_h
+#ifndef DragCaretController_h
+#define DragCaretController_h
 
-#include "modules/filesystem/DOMFileSystemSync.h"
-#include "platform/heap/Handle.h"
+#include "core/editing/Caret.h"
 
 namespace blink {
 
-class EntryCallback;
-class EntrySync;
-class ErrorCallback;
-class ExceptionState;
-class FileSystemCallback;
-class WorkerGlobalScope;
-
-class WorkerGlobalScopeFileSystem {
+class DragCaretController final : public NoBaseWillBeGarbageCollected<DragCaretController>, private CaretBase {
+    WTF_MAKE_NONCOPYABLE(DragCaretController);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DragCaretController);
 public:
-    enum {
-        TEMPORARY,
-        PERSISTENT,
-    };
+    static PassOwnPtrWillBeRawPtr<DragCaretController> create();
+
+    LayoutBlock* caretLayoutObject() const { return CaretBase::caretPainter(); }
+    void paintDragCaret(LocalFrame*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
+
+    bool isContentEditable() const { return m_position.rootEditableElement(); }
+    bool isContentRichlyEditable() const;
 
-    static void webkitRequestFileSystem(WorkerGlobalScope&, int type, long long size, FileSystemCallback* successCallback, ErrorCallback*);
-    static DOMFileSystemSync* webkitRequestFileSystemSync(WorkerGlobalScope&, int type, long long size, ExceptionState&);
-    static void webkitResolveLocalFileSystemURL(WorkerGlobalScope&, const String& url, EntryCallback* successCallback, ErrorCallback*);
-    static EntrySync* webkitResolveLocalFileSystemSyncURL(WorkerGlobalScope&, const String& url, ExceptionState&);
+    bool hasCaret() const { return m_position.isNotNull(); }
+    const VisiblePosition& caretPosition() { return m_position; }
+    void setCaretPosition(const VisiblePosition&);
+    void clear() { setCaretPosition(VisiblePosition()); }
+
+    void nodeWillBeRemoved(Node&);
+
+    DECLARE_TRACE();
 
 private:
-    WorkerGlobalScopeFileSystem();
-    ~WorkerGlobalScopeFileSystem();
+    DragCaretController();
+
+    VisiblePosition m_position;
 };
 
 } // namespace blink
 
-#endif // WorkerGlobalScopeFileSystem_h
+#endif // DragCaretController_h