Implement hot mode invocation for idle time spell checker

third_party/WebKit/Source/core/editing/Editor.h

 /*
  * Copyright (C) 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 180 matching lines @@
   bool insertLineBreak();
   bool insertParagraphSeparator();
 
   bool isOverwriteModeEnabled() const { return m_overwriteModeEnabled; }
   void toggleOverwriteModeEnabled();
 
   bool canUndo();
   void undo();
   bool canRedo();
   void redo();
+  UndoStack& undoStack() const { return *m_undoStack; }

[yosin_UTC9, 2017/03/02 03:38:40]

This should be |const UndoStack&|. Except for Editor, we should not change
|UndoStack|.

[Xiaocheng, 2017/03/02 04:34:59]

Compile error if changed to |const UndoStack&|: binding value of type 'const
blink::UndoStack' to reference to type 'blink::UndoStack' drops 'const'
qualifier

 
   void setBaseWritingDirection(WritingDirection);
 
   // smartInsertDeleteEnabled and selectTrailingWhitespaceEnabled are
   // mutually exclusive, meaning that enabling one will disable the other.
   bool smartInsertDeleteEnabled() const;
   bool isSelectTrailingWhitespaceEnabled() const;
 
   bool preventRevealSelection() const { return m_preventRevealSelection; }
 
@@ skipping 171 matching lines @@
   m_typingStyle.clear();
 }
 
 inline void Editor::setTypingStyle(EditingStyle* style) {
   m_typingStyle = style;
 }
 
 }  // namespace blink
 
 #endif  // Editor_h