TEXTAREA should not reset the caret position when it is focused by sequential focus navigation.

third_party/WebKit/Source/core/html/HTMLTextAreaElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 225 matching lines @@
 }
 
 bool HTMLTextAreaElement::shouldShowFocusRingOnMouseFocus() const
 {
     return true;
 }
 
 void HTMLTextAreaElement::updateFocusAppearance(SelectionBehaviorOnFocus selectionBehavior)
 {
     switch (selectionBehavior) {
-    case SelectionBehaviorOnFocus::Reset:
-        setSelectionRange(0, 0, SelectionHasNoDirection, NotDispatchSelectEvent);
-        break;
+    case SelectionBehaviorOnFocus::Reset: // Fallthrough.
     case SelectionBehaviorOnFocus::Restore:
         restoreCachedSelection();
         break;
     case SelectionBehaviorOnFocus::None:
         return;
     }
     if (document().frame())
         document().frame()->selection().revealSelection();
 }
 
@@ skipping 391 matching lines @@
 
 void HTMLTextAreaElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     const HTMLTextAreaElement& sourceElement = static_cast<const HTMLTextAreaElement&>(source);
     setValueCommon(sourceElement.value(), DispatchNoEvent, SetSeletion);
     m_isDirty = sourceElement.m_isDirty;
     HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 } // namespace blink