Select All present even all selectable text has been selected

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 313 matching lines @@
 bool Editor::canPaste() const {
   return canEdit();
 }
 
 bool Editor::canDelete() const {
   FrameSelection& selection = frame().selection();
   return selection.computeVisibleSelectionInDOMTreeDeprecated().isRange() &&
          selection.computeVisibleSelectionInDOMTree().rootEditableElement();
 }
 
+bool Editor::canSelectAll() const {
+  return frame().selection().canSelectAll();
+}
+
 bool Editor::smartInsertDeleteEnabled() const {
   if (Settings* settings = frame().settings())
     return settings->getSmartInsertDeleteEnabled();
   return false;
 }
 
 bool Editor::canSmartCopyOrDelete() const {
   return smartInsertDeleteEnabled() &&
          frame().selection().granularity() == WordGranularity;
 }
@@ skipping 1422 matching lines @@
 
 DEFINE_TRACE(Editor) {
   visitor->trace(m_frame);
   visitor->trace(m_lastEditCommand);
   visitor->trace(m_undoStack);
   visitor->trace(m_mark);
   visitor->trace(m_typingStyle);
 }
 
 }  // namespace blink