Revert of Do not send redundant selectionchange-events

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 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 356 matching lines @@
   const Node* result = nullptr;
   for (const Node* n = &node; n && hasEditableStyle(*n); n = n->parentNode()) {
     if (n->isElementNode())
       result = n;
     if (node.document().body() == n)
       break;
   }
   return toElement(const_cast<Node*>(result));
 }
 
-bool selectionHasFocus(const SelectionInFlatTree& selection) {
-  if (selection.isNone())
-    return false;
-
-  const Document* document = selection.base().document();
-  const Element* focus = document->focusedElement();
-  if (!focus) {
-    // No focused element means document root has focus.
-    focus = document->documentElement();
-  }
-
-  const Node* const nodeWhereSelectionStarts =
-      selection.base().computeContainerNode();
-  const Node* const nodeWhereSelectionEnds =
-      selection.extent().computeContainerNode();
-
-  return focus->containsIncludingHostElements(*nodeWhereSelectionStarts) ||
-         focus->containsIncludingHostElements(*nodeWhereSelectionEnds);
-}
-
 ContainerNode* highestEditableRoot(
     const Position& position,
     Element* (*rootEditableElementOf)(const Position&),
     bool (*hasEditableStyle)(const Node&)) {
   if (position.isNull())
     return 0;
 
   ContainerNode* highestRoot = rootEditableElementOf(position);
   if (!highestRoot)
     return 0;
@@ skipping 1786 matching lines @@
         return InputType::DeleteWordBackward;
       if (granularity == LineBoundary)
         return InputType::DeleteLineBackward;
       return InputType::DeleteContentBackward;
     default:
       return InputType::None;
   }
 }
 
 }  // namespace blink