Explicit management of FrameSelection availability

third_party/WebKit/Source/core/editing/FrameCaret.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 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 214 matching lines @@
     if (node != m_previousCaretNode)
         return;
     // Hits in ManualTests/caret-paint-after-last-text-is-removed.html
     DisableCompositingQueryAsserts disabler;
     invalidateLocalCaretRect(m_previousCaretNode.get(), m_previousCaretRect);
     m_previousCaretNode = nullptr;
     m_previousCaretRect = LayoutRect();
     m_previousCaretVisibility = CaretVisibility::Hidden;
 }
 
-void FrameCaret::prepareForDestruction()
+void FrameCaret::documentDetached()
 {
     m_caretPosition = PositionWithAffinity();
     m_caretBlinkTimer.stop();
     m_previousCaretNode.clear();
 }
 
 bool FrameCaret::shouldBlinkCaret() const
 {
     if (!caretIsVisible() || !isActive())
         return false;
@@ skipping 15 matching lines @@
 void FrameCaret::caretBlinkTimerFired(Timer<FrameCaret>*)
 {
     DCHECK(caretIsVisible());
     if (isCaretBlinkingSuspended() && m_shouldPaintCaret)
         return;
     m_shouldPaintCaret = !m_shouldPaintCaret;
     setCaretRectNeedsUpdate();
 }
 
 } // nemaspace blink