Make the constructor of a LayoutRect from an IntRect explicit.

Source/modules/accessibility/AXScrollView.cpp

 /*
  * Copyright (C) 2011 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
@@ skipping 188 matching lines @@
         return m_verticalScrollbar.get();
 
     return webArea->accessibilityHitTest(point);
 }
 
 LayoutRect AXScrollView::elementRect() const
 {
     if (!m_scrollView)
         return LayoutRect();
 
-    return m_scrollView->frameRect();
+    return LayoutRect(m_scrollView->frameRect());
 }
 
 FrameView* AXScrollView::documentFrameView() const
 {
     if (!m_scrollView || !m_scrollView->isFrameView())
         return 0;
 
     return m_scrollView;
 }
 
@@ skipping 27 matching lines @@
     return m_scrollView;
 }
 
 void AXScrollView::scrollTo(const IntPoint& point) const
 {
     if (m_scrollView)
         m_scrollView->setScrollPosition(point);
 }
 
 } // namespace blink