TEXTAREA: Cutting last line without EOL should not remove the remaining EOL in the previous line.

third_party/WebKit/Source/core/html/HTMLTextFormControlElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 79 matching lines @@
 
     virtual String value() const = 0;
     virtual void setValue(const String&, TextFieldEventBehavior = DispatchNoEvent) = 0;
 
     HTMLElement* innerEditorElement() const;
 
     void selectionChanged(bool userTriggered);
     bool lastChangeWasUserEdit() const;
     virtual void setInnerEditorValue(const String&);
     String innerEditorValue() const;
+    PassRefPtrWillBeRawPtr<Node> createPlaceholderBreakElement() const;
 
     String directionForFormData() const;
 
     void setTextAsOfLastFormControlChangeEvent(const String& text) { m_textAsOfLastFormControlChangeEvent = text; }
 
     // These functions don't cause synchronous layout and SpellChecker uses
     // them to improve performance.
     // Passed |Position| must point inside of a text form control.
     static Position startOfWord(const Position&);
     static Position endOfWord(const Position&);
@@ skipping 14 matching lines @@
         m_cachedSelectionEnd = end;
         m_cachedSelectionDirection = direction;
     }
 
     void restoreCachedSelection();
 
     void defaultEventHandler(Event*) override;
     virtual void subtreeHasChanged() = 0;
 
     void setLastChangeWasNotUserEdit() { m_lastChangeWasUserEdit = false; }
-
+    void addPlaceholderBreakElementIfNecessary();
     String valueWithHardLineBreaks() const;
 
     virtual bool shouldDispatchFormControlChangeEvent(String&, String&);
     void copyNonAttributePropertiesFromElement(const Element&) override;
 
 private:
     int computeSelectionStart() const;
     int computeSelectionEnd() const;
     TextFieldSelectionDirection computeSelectionDirection() const;
 
@@ skipping 26 matching lines @@
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTextFormControlElement);
 
 HTMLTextFormControlElement* enclosingTextFormControl(const Position&);
 HTMLTextFormControlElement* enclosingTextFormControl(Node*);
 
 } // namespace blink
 
 #endif