[EditCommandSource] Pass source to |CompositEditCommand| and |TypingCommand| (3/3)

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

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 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 169 matching lines @@
   UndoStep::trace(visitor);
 }
 
 CompositeEditCommand::CompositeEditCommand(Document& document)
     : EditCommand(document) {}
 
 CompositeEditCommand::~CompositeEditCommand() {
   DCHECK(isTopLevelCommand() || !m_composition);
 }
 
-bool CompositeEditCommand::apply() {
+// TODO(chongz): Fire 'beforeinput' based on |EditCommandSource|.
+bool CompositeEditCommand::apply(EditCommandSource) {
   DCHECK(!isCommandGroupWrapper());
   if (!endingSelection().isContentRichlyEditable()) {
     switch (inputType()) {
       case InputEvent::InputType::InsertText:
       case InputEvent::InputType::InsertLineBreak:
       case InputEvent::InputType::InsertParagraph:
       case InputEvent::InputType::InsertFromPaste:
       case InputEvent::InputType::InsertFromDrop:
       case InputEvent::InputType::InsertReplacementText:
       case InputEvent::InputType::DeleteComposedCharacterForward:
@@ skipping 1828 matching lines @@
   return node;
 }
 
 DEFINE_TRACE(CompositeEditCommand) {
   visitor->trace(m_commands);
   visitor->trace(m_composition);
   EditCommand::trace(visitor);
 }
 
 }  // namespace blink