[InputEvent] Support |deleteByDrag|, |insertFromDrop| and fire in sequential order

third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.h

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 class HTMLTableRowElement;
 
 class DeleteSelectionCommand final : public CompositeEditCommand {
  public:
   static DeleteSelectionCommand* create(
       Document& document,
       bool smartDelete = false,
       bool mergeBlocksAfterDelete = true,
       bool expandForSpecialElements = false,
       bool sanitizeMarkup = true,
-      InputEvent::InputType inputType = InputEvent::InputType::None) {
+      InputEvent::InputType inputType = InputEvent::InputType::None,
+      const Position& referenceMovePosition = Position()) {
     return new DeleteSelectionCommand(
         document, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements,
-        sanitizeMarkup, inputType);
+        sanitizeMarkup, inputType, referenceMovePosition);
   }
   static DeleteSelectionCommand* create(
       const VisibleSelection& selection,
       bool smartDelete = false,
       bool mergeBlocksAfterDelete = true,
       bool expandForSpecialElements = false,
       bool sanitizeMarkup = true,
       InputEvent::InputType inputType = InputEvent::InputType::None) {
     return new DeleteSelectionCommand(
         selection, smartDelete, mergeBlocksAfterDelete,
         expandForSpecialElements, sanitizeMarkup, inputType);
   }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   DeleteSelectionCommand(Document&,
                          bool smartDelete,
                          bool mergeBlocksAfterDelete,
                          bool expandForSpecialElements,
                          bool santizeMarkup,
-                         InputEvent::InputType);
+                         InputEvent::InputType,
+                         const Position& referenceMovePosition);
   DeleteSelectionCommand(const VisibleSelection&,
                          bool smartDelete,
                          bool mergeBlocksAfterDelete,
                          bool expandForSpecialElements,
                          bool sanitizeMarkup,
                          InputEvent::InputType);
 
   void doApply(EditingState*) override;
   InputEvent::InputType inputType() const override;
 
@@ skipping 31 matching lines @@
 
   // This data is transient and should be cleared at the end of the doApply function.
   VisibleSelection m_selectionToDelete;
   Position m_upstreamStart;
   Position m_downstreamStart;
   Position m_upstreamEnd;
   Position m_downstreamEnd;
   Position m_endingPosition;
   Position m_leadingWhitespace;
   Position m_trailingWhitespace;
+  Position m_referenceMovePosition;
   Member<Node> m_startBlock;
   Member<Node> m_endBlock;
   Member<EditingStyle> m_typingStyle;
   Member<EditingStyle> m_deleteIntoBlockquoteStyle;
   Member<Element> m_startRoot;
   Member<Element> m_endRoot;
   Member<HTMLTableRowElement> m_startTableRow;
   Member<HTMLTableRowElement> m_endTableRow;
   Member<Node> m_temporaryPlaceholder;
 };
 
 }  // namespace blink
 
 #endif  // DeleteSelectionCommand_h