[Editing] Store |CommandSource| in |CompositeEditCommand|

third_party/WebKit/Source/core/editing/commands/RemoveNodePreservingChildrenCommand.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 15 matching lines @@
 #ifndef RemoveNodePreservingChildrenCommand_h
 #define RemoveNodePreservingChildrenCommand_h
 
 #include "core/editing/commands/CompositeEditCommand.h"
 
 namespace blink {
 
 class RemoveNodePreservingChildrenCommand final : public CompositeEditCommand {
  public:
   static RemoveNodePreservingChildrenCommand* create(
+      CommandSource source,
       Node* node,
       ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable) {
     return new RemoveNodePreservingChildrenCommand(
-        node, shouldAssumeContentIsAlwaysEditable);
+        source, node, shouldAssumeContentIsAlwaysEditable);
   }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  RemoveNodePreservingChildrenCommand(Node*,
+  RemoveNodePreservingChildrenCommand(CommandSource,
+                                      Node*,
                                       ShouldAssumeContentIsAlwaysEditable);
 
   void doApply(EditingState*) override;
 
   Member<Node> m_node;
   ShouldAssumeContentIsAlwaysEditable m_shouldAssumeContentIsAlwaysEditable;
 };
 
 }  // namespace blink
 
 #endif  // RemoveNodePreservingChildrenCommand_h