[Editing] Store |CommandSource| in |CompositeEditCommand|

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

 /*
  * Copyright (C) 2012 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 SimplifyMarkupCommand_h
 #define SimplifyMarkupCommand_h
 
 #include "core/editing/commands/CompositeEditCommand.h"
 
 namespace blink {
 
 class SimplifyMarkupCommand final : public CompositeEditCommand {
  public:
   static SimplifyMarkupCommand* create(Document& document,
+                                       CommandSource source,
                                        Node* firstNode,
                                        Node* nodeAfterLast) {
-    return new SimplifyMarkupCommand(document, firstNode, nodeAfterLast);
+    return new SimplifyMarkupCommand(document, source, firstNode,
+                                     nodeAfterLast);
   }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  SimplifyMarkupCommand(Document&, Node* firstNode, Node* nodeAfterLast);
+  SimplifyMarkupCommand(Document&,
+                        CommandSource,
+                        Node* firstNode,
+                        Node* nodeAfterLast);
 
   void doApply(EditingState*) override;
   int pruneSubsequentAncestorsToRemove(
       HeapVector<Member<ContainerNode>>& nodesToRemove,
       size_t startNodeIndex,
       EditingState*);
 
   Member<Node> m_firstNode;
   Member<Node> m_nodeAfterLast;
 };
 
 }  // namespace blink
 
 #endif  // SimplifyMarkupCommand_h