[Editing] Store |CommandSource| in |CompositeEditCommand|

third_party/WebKit/Source/core/editing/commands/InsertLineBreakCommand.cpp

 /*
  * Copyright (C) 2005, 2006 Apple Computer, 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 26 matching lines @@
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/TextControlElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutText.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
-InsertLineBreakCommand::InsertLineBreakCommand(Document& document)
-    : CompositeEditCommand(document) {}
+InsertLineBreakCommand::InsertLineBreakCommand(Document& document,
+                                               CommandSource source)
+    : CompositeEditCommand(document, source) {}
 
 bool InsertLineBreakCommand::preservesTypingStyle() const {
   return true;
 }
 
 // Whether we should insert a break element or a '\n'.
 bool InsertLineBreakCommand::shouldUseBreakElement(
     const Position& insertionPos) {
   // An editing position like [input, 0] actually refers to the position before
   // the input element, and in that case we need to check the input element's
@@ skipping 164 matching lines @@
     // block.
     setEndingSelection(SelectionInDOMTree::Builder()
                            .collapse(endingSelection().end())
                            .build());
   }
 
   rebalanceWhitespace();
 }
 
 }  // namespace blink