Reland 'Use FrameSelection::selectedText where possible.'

third_party/WebKit/Source/core/editing/SelectionEditor.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 148 matching lines @@
     m_selection.setIsDirectional(isDirectional);
     m_selectionInComposedTree.setIsDirectional(isDirectional);
 }
 
 void SelectionEditor::setWithoutValidation(const Position& start, const Position& end)
 {
     m_selection.setWithoutValidation(start, end);
     adjustVisibleSelectionInComposedTree();
 }
 
+void SelectionEditor::setSelectionInTextFormControl(const Position& start, const Position& end)
+{
+    m_selection.setWithoutValidation(start, end);
+    m_selectionInComposedTree.setWithoutValidation(toPositionInComposedTree(start), toPositionInComposedTree(end));
+}
+
 TextDirection SelectionEditor::directionOfEnclosingBlock()
 {
     return blink::directionOfEnclosingBlock(m_selection.extent());
 }
 
 TextDirection SelectionEditor::directionOfSelection()
 {
     InlineBox* startBox = nullptr;
     InlineBox* endBox = nullptr;
     // Cache the VisiblePositions because visibleStart() and visibleEnd()
@@ skipping 752 matching lines @@
 DEFINE_TRACE(SelectionEditor)
 {
     visitor->trace(m_frameSelection);
     visitor->trace(m_selection);
     visitor->trace(m_selectionInComposedTree);
     visitor->trace(m_logicalRange);
     VisibleSelectionChangeObserver::trace(visitor);
 }
 
 } // namespace blink