[Editing] Store |CommandSource| in |CompositeEditCommand|

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

Index: third_party/WebKit/Source/core/editing/commands/SimplifyMarkupCommand.h
diff --git a/third_party/WebKit/Source/core/editing/commands/SimplifyMarkupCommand.h b/third_party/WebKit/Source/core/editing/commands/SimplifyMarkupCommand.h
index 0283dccc7555dc62d55b15f93599039f8b33a5ff..dbeb6d4027f9281b84610f3b9e182f37725859e2 100644
--- a/third_party/WebKit/Source/core/editing/commands/SimplifyMarkupCommand.h
+++ b/third_party/WebKit/Source/core/editing/commands/SimplifyMarkupCommand.h
@@ -33,15 +33,20 @@ 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(