Make DragController to use VisibleSelection::toNormalizedEphemeralRange() instead of toNormalizedRan

Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 412 matching lines @@
         return DragOperationNone;
     return dragOperation(dragData);
 }
 
 static bool setSelectionToDragCaret(LocalFrame* frame, VisibleSelection& dragCaret, RefPtrWillBeRawPtr<Range>& range, const IntPoint& point)
 {
     frame->selection().setSelection(dragCaret);
     if (frame->selection().isNone()) {
         dragCaret = VisibleSelection(frame->visiblePositionForPoint(point));
         frame->selection().setSelection(dragCaret);
-        range = dragCaret.toNormalizedRange();
+        range = createRange(dragCaret.toNormalizedEphemeralRange());
     }
     return !frame->selection().isNone() && frame->selection().isContentEditable();
 }
 
 bool DragController::dispatchTextInputEventFor(LocalFrame* innerFrame, DragData* dragData)
 {
     ASSERT(m_page->dragCaretController().hasCaret());
     String text = m_page->dragCaretController().isContentRichlyEditable() ? "" : dragData->asPlainText();
     Element* target = innerFrame->editor().findEventTargetFrom(VisibleSelection(m_page->dragCaretController().caretPosition()));
     return target->dispatchEvent(TextEvent::createForDrop(innerFrame->domWindow(), text));
@@ skipping 32 matching lines @@
         return fileInput->receiveDroppedFiles(dragData);
     }
 
     if (!m_page->dragController().canProcessDrag(dragData)) {
         m_page->dragCaretController().clear();
         return false;
     }
 
     VisibleSelection dragCaret(m_page->dragCaretController().caretPosition());
     m_page->dragCaretController().clear();
-    RefPtrWillBeRawPtr<Range> range = dragCaret.toNormalizedRange();
+    RefPtrWillBeRawPtr<Range> range = createRange(dragCaret.toNormalizedEphemeralRange());
     RefPtrWillBeRawPtr<Element> rootEditableElement = innerFrame->selection().rootEditableElement();
 
     // For range to be null a WebKit client must have done something bad while
     // manually controlling drag behaviour
     if (!range)
         return false;
     ResourceFetcher* fetcher = range->ownerDocument().fetcher();
     ResourceCacheValidationSuppressor validationSuppressor(fetcher);
     if (dragIsMove(innerFrame->selection(), dragData) || dragCaret.isContentRichlyEditable()) {
         bool chosePlainText = false;
@@ skipping 461 matching lines @@
 
 DEFINE_TRACE(DragController)
 {
     visitor->trace(m_page);
     visitor->trace(m_documentUnderMouse);
     visitor->trace(m_dragInitiator);
     visitor->trace(m_fileInputElementUnderMouse);
 }
 
 } // namespace blink