Introduce positionForPoint() in LocalFrame class as replacement of visiblePositionForPoint()

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 356 matching lines @@
             return false;
 
         HTMLInputElement* elementAsFileInput = asFileInput(element);
         if (m_fileInputElementUnderMouse != elementAsFileInput) {
             if (m_fileInputElementUnderMouse)
                 m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);
             m_fileInputElementUnderMouse = elementAsFileInput;
         }
 
         if (!m_fileInputElementUnderMouse)
-            m_page->dragCaretController().setCaretPosition(m_documentUnderMouse->frame()->visiblePositionForPoint(point));
+            m_page->dragCaretController().setCaretPosition(m_documentUnderMouse->frame()->positionForPoint(point));
 
         LocalFrame* innerFrame = element->document().frame();
         dragSession.operation = dragIsMove(innerFrame->selection(), dragData) ? DragOperationMove : DragOperationCopy;
         dragSession.mouseIsOverFileInput = m_fileInputElementUnderMouse;
         dragSession.numberOfItemsToBeAccepted = 0;
 
         Vector<String> paths;
         dragData->asFilePaths(paths);
         const unsigned numberOfFiles = paths.size();
         if (m_fileInputElementUnderMouse) {
@@ skipping 33 matching lines @@
 
     if (doc && (m_didInitiateDrag || doc->isPluginDocument() || doc->hasEditableStyle()))
         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));
+        dragCaret = VisibleSelection(frame->positionForPoint(point));
         frame->selection().setSelection(dragCaret);
         range = dragCaret.toNormalizedRange();
     }
     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();
@@ skipping 516 matching lines @@
 
 DEFINE_TRACE(DragController)
 {
     visitor->trace(m_page);
     visitor->trace(m_documentUnderMouse);
     visitor->trace(m_dragInitiator);
     visitor->trace(m_fileInputElementUnderMouse);
 }
 
 } // namespace blink