Use a block cursor in overtype mode

Source/core/editing/FrameSelection.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 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 238 matching lines @@
 
     FloatRect bounds(bool clipToVisibleContent = true) const;
 
     void getClippedVisibleTextRectangles(Vector<FloatRect>&) const;
 
     HTMLFormElement* currentForm() const;
 
     void revealSelection(const ScrollAlignment& = ScrollAlignment::alignCenterIfNeeded, RevealExtentOption = DoNotRevealExtent);
     void setSelectionFromNone();
 
+    bool shouldShowBlockCursor() const { return m_shouldShowBlockCursor; }
+    void setShouldShowBlockCursor(bool);
+
 private:
     enum EPositionType { START, END, BASE, EXTENT };
 
     void respondToNodeModification(Node*, bool baseRemoved, bool extentRemoved, bool startRemoved, bool endRemoved);
     TextDirection directionOfEnclosingBlock();
     TextDirection directionOfSelection();
 
     VisiblePosition positionForPlatform(bool isGetStart) const;
     VisiblePosition startForPlatform() const;
     VisiblePosition endForPlatform() const;
@@ skipping 36 matching lines @@
 
     RefPtr<EditingStyle> m_typingStyle;
 
     Timer<FrameSelection> m_caretBlinkTimer;
     // The painted bounds of the caret in absolute coordinates
     IntRect m_absCaretBounds;
     bool m_absCaretBoundsDirty : 1;
     bool m_caretPaint : 1;
     bool m_isCaretBlinkingSuspended : 1;
     bool m_focused : 1;
+    bool m_shouldShowBlockCursor : 1;
 };
 
 inline EditingStyle* FrameSelection::typingStyle() const
 {
     return m_typingStyle.get();
 }
 
 inline void FrameSelection::clearTypingStyle()
 {
     m_typingStyle.clear();
 }
 
 inline void FrameSelection::setTypingStyle(PassRefPtr<EditingStyle> style)
 {
     m_typingStyle = style;
 }
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const WebCore::FrameSelection&);
 void showTree(const WebCore::FrameSelection*);
 #endif
 
 #endif // FrameSelection_h