Add API to WebFrame to enable/disable caret.

Source/web/WebFrameImpl.cpp

 /*
  * 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 1348 matching lines @@
 {
     Element* editable = frame()->selection()->rootEditableElement();
     if (!editable)
         return;
 
     VisiblePosition position = visiblePositionForWindowPoint(point);
     if (frame()->selection()->shouldChangeSelection(position))
         frame()->selection()->moveTo(position, UserTriggered);
 }
 
+void WebFrameImpl::setCaretEnabled(bool enable)
+{
+    frame()->selection()->setCaretVisible(enable);

[abarth-chromium, 2013/08/12 18:40:34]

Is there a reason to use a different name in the API and the implementation? 
Perhaps we should use the name "setCaretVisible" in the API...

[varunjain, 2013/08/12 21:43:40]

No particular reason. Changed.

+}
+
 VisiblePosition WebFrameImpl::visiblePositionForWindowPoint(const WebPoint& point)
 {
     FloatPoint unscaledPoint(point);
     unscaledPoint.scale(1 / view()->pageScaleFactor(), 1 / view()->pageScaleFactor());
 
     HitTestRequest request = HitTestRequest::Move | HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::DisallowShadowContent;
     HitTestResult result(frame()->view()->windowToContents(roundedIntPoint(unscaledPoint)));
     frame()->document()->renderView()->layer()->hitTest(request, result);
 
     Node* node = result.targetNode();
@@ skipping 1103 matching lines @@
 
         // There is a possibility that the frame being detached was the only
         // pending one. We need to make sure final replies can be sent.
         flushCurrentScopingEffort(m_findRequestIdentifier);
 
         cancelPendingScopingEffort();
     }
 }
 
 } // namespace WebKit