Use tighter typing in editing: Editor / EditorCommand

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 420 matching lines @@
         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();
-    Node* target = innerFrame->editor().findEventTargetFrom(VisibleSelection(m_page->dragCaretController().caretPosition()));
+    Element* target = innerFrame->editor().findEventTargetFrom(VisibleSelection(m_page->dragCaretController().caretPosition()));
     return target->dispatchEvent(TextEvent::createForDrop(innerFrame->domWindow(), text), IGNORE_EXCEPTION);
 }
 
 bool DragController::concludeEditDrag(DragData* dragData)
 {
     ASSERT(dragData);
 
     RefPtrWillBeRawPtr<HTMLInputElement> fileInput = m_fileInputElementUnderMouse;
     if (m_fileInputElementUnderMouse) {
         m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);
@@ skipping 513 matching lines @@
 
 void DragController::trace(Visitor* visitor)
 {
     visitor->trace(m_page);
     visitor->trace(m_documentUnderMouse);
     visitor->trace(m_dragInitiator);
     visitor->trace(m_fileInputElementUnderMouse);
 }
 
 } // namespace blink