Revert of Remove ClearSelection() from Layout{BlockFlow,Inline}::WillbeDestroyed()

third_party/WebKit/Source/core/layout/LayoutInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 58 matching lines @@
   // have continuations of their own that are anonymous children of our
   // continuation.
   LayoutBoxModelObject* continuation = this->Continuation();
   if (continuation) {
     continuation->Destroy();
     SetContinuation(nullptr);
   }
 
   if (!DocumentBeingDestroyed()) {
     if (FirstLineBox()) {
+      // We can't wait for LayoutBoxModelObject::destroy to clear the selection,
+      // because by then we will have nuked the line boxes.
+      // FIXME: The FrameSelection should be responsible for this when it
+      // is notified of DOM mutations.
+      if (IsSelectionBorder())
+        View()->ClearSelection();
+
       // If line boxes are contained inside a root, that means we're an inline.
       // In that case, we need to remove all the line boxes so that the parent
       // lines aren't pointing to deleted children. If the first line box does
       // not have a parent that means they are either already disconnected or
       // root lines that can just be destroyed without disconnecting.
       if (FirstLineBox()->Parent()) {
         for (InlineFlowBox* box = FirstLineBox(); box; box = box->NextLineBox())
           box->Remove();
       }
     } else if (Parent()) {
@@ skipping 1453 matching lines @@
     paint_invalidator.InvalidateDisplayItemClient(*box, invalidation_reason);
 }
 
 // TODO(lunalu): Not to just dump 0, 0 as the x and y here
 LayoutRect LayoutInline::DebugRect() const {
   IntRect lines_box = EnclosingIntRect(LinesBoundingBox());
   return LayoutRect(IntRect(0, 0, lines_box.Width(), lines_box.Height()));
 }
 
 }  // namespace blink