canUndo           930 Source/core/editing/Editor.cpp         return undoStack->canUndo();
canUndo           168 Source/core/editing/Editor.h     bool canUndo();
canUndo          1283 Source/core/editing/EditorCommand.cpp     return frame.editor().canUndo();
canUndo           101 Source/core/editing/UndoStack.cpp     if (canUndo()) {
canUndo            51 Source/core/editing/UndoStack.h     bool canUndo() const;
canUndo           198 Source/web/ContextMenuClientImpl.cpp     if (toLocalFrame(m_webView->focusedWebCoreFrame())->editor().canUndo())