[Editing] Store |CommandSource| in |CompositeEditCommand|

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

Index: third_party/WebKit/Source/core/editing/commands/InsertListCommand.h
diff --git a/third_party/WebKit/Source/core/editing/commands/InsertListCommand.h b/third_party/WebKit/Source/core/editing/commands/InsertListCommand.h
index 14778538ad51741f9de61b95f6e0e71ca361045d..4c30732c1a0ee973824cb90a69163f25be87d9cc 100644
--- a/third_party/WebKit/Source/core/editing/commands/InsertListCommand.h
+++ b/third_party/WebKit/Source/core/editing/commands/InsertListCommand.h
@@ -37,8 +37,10 @@ class CORE_EXPORT InsertListCommand final : public CompositeEditCommand {
  public:
   enum Type { OrderedList, UnorderedList };
 
-  static InsertListCommand* create(Document& document, Type listType) {
-    return new InsertListCommand(document, listType);
+  static InsertListCommand* create(Document& document,
+                                   CommandSource source,
+                                   Type listType) {
+    return new InsertListCommand(document, source, listType);
   }
 
   bool preservesTypingStyle() const override { return true; }
@@ -46,7 +48,7 @@ class CORE_EXPORT InsertListCommand final : public CompositeEditCommand {
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  InsertListCommand(Document&, Type);
+  InsertListCommand(Document&, CommandSource, Type);
 
   void doApply(EditingState*) override;
   InputEvent::InputType inputType() const override;