Clean up names related to EditCommandComposition

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/commands/UndoStep.h"
 
 #include "core/editing/Editor.h"
 #include "core/editing/commands/EditCommand.h"
 
 namespace blink {
@@ skipping 58 matching lines @@
 }
 
 InputEvent::InputType UndoStep::inputType() const {
   return m_inputType;
 }
 
 void UndoStep::append(SimpleEditCommand* command) {
   m_commands.push_back(command);
 }
 
-void UndoStep::append(UndoStep* composition) {
-  m_commands.appendVector(composition->m_commands);
+void UndoStep::append(UndoStep* undoStep) {
+  m_commands.appendVector(undoStep->m_commands);
 }
 
 void UndoStep::setStartingSelection(const VisibleSelection& selection) {
   m_startingSelection = selection;
   m_startingRootEditableElement = selection.rootEditableElement();
 }
 
 void UndoStep::setEndingSelection(const VisibleSelection& selection) {
   m_endingSelection = selection;
   m_endingRootEditableElement = selection.rootEditableElement();
 }
 
 DEFINE_TRACE(UndoStep) {
   visitor->trace(m_document);
   visitor->trace(m_startingSelection);
   visitor->trace(m_endingSelection);
   visitor->trace(m_commands);
   visitor->trace(m_startingRootEditableElement);
   visitor->trace(m_endingRootEditableElement);
 }
 
 }  // namespace blink