Add API to WebFrame to enable/disable caret.

public/web/WebFrame.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 438 matching lines @@
     virtual void moveCaretSelectionTowardsWindowPoint(const WebPoint&) = 0;
 
     virtual void selectRange(const WebRange&) = 0;
 
     // Move the current selection to the provided window point/points. If the
     // current selection is editable, the new selection will be restricted to
     // the root editable element.
     virtual void moveRangeSelection(const WebPoint& base, const WebPoint& extent) = 0;
     virtual void moveCaretSelection(const WebPoint&) = 0;
 
+    virtual void setCaretVisible(bool) = 0;
+
     // Printing ------------------------------------------------------------
 
     // Reformats the WebFrame for printing. WebPrintParams specifies the printable
     // content size, paper size, printable area size, printer DPI and print
     // scaling option. If constrainToNode node is specified, then only the given node
     // is printed (for now only plugins are supported), instead of the entire frame.
     // Returns the number of pages that can be printed at the given
     // page size. The out param useBrowserOverlays specifies whether the browser
     // process should use its overlays (header, footer, margins etc) or whether
     // the renderer controls this.
@@ skipping 179 matching lines @@
     // text form. This is used only by layout tests.
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const = 0;
 
 protected:
     ~WebFrame() { }
 };
 
 } // namespace WebKit
 
 #endif