Simplify RenderedPosition constructor with VisiblePosition parameter

Source/core/editing/RenderedPosition.cpp

 /*
  * Copyright (C) 2011 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 49 matching lines @@
     case PositionAnchorType::AfterChildren:
         layoutObjectNode = position.anchorNode()->lastChild();
         break;
     }
     if (!layoutObjectNode || !layoutObjectNode->layoutObject())
         layoutObjectNode = position.anchorNode();
     return layoutObjectNode->layoutObject();
 }
 
 RenderedPosition::RenderedPosition(const VisiblePosition& position)
-    : m_layoutObject(nullptr)
-    , m_inlineBox(nullptr)
-    , m_offset(0)
-    , m_prevLeafChild(uncachedInlineBox())
-    , m_nextLeafChild(uncachedInlineBox())
+    : RenderedPosition(position.deepEquivalent(), position.affinity())
 {
-    if (position.isNull())
-        return;
-    InlineBoxPosition boxPosition = computeInlineBoxPosition(position);
-    m_inlineBox = boxPosition.inlineBox;
-    m_offset = boxPosition.offsetInBox;
-    if (m_inlineBox)
-        m_layoutObject = &m_inlineBox->layoutObject();
-    else
-        m_layoutObject = layoutObjectFromPosition(position.deepEquivalent());
 }
 
 RenderedPosition::RenderedPosition(const Position& position, TextAffinity affinity)
     : m_layoutObject(nullptr)
     , m_inlineBox(nullptr)
     , m_offset(0)
     , m_prevLeafChild(uncachedInlineBox())
     , m_nextLeafChild(uncachedInlineBox())
 {
     if (position.isNull())
@@ skipping 166 matching lines @@
 bool layoutObjectContainsPosition(LayoutObject* target, const Position& position)
 {
     for (LayoutObject* layoutObject = layoutObjectFromPosition(position); layoutObject && layoutObject->node(); layoutObject = layoutObject->parent()) {
         if (layoutObject == target)
             return true;
     }
     return false;
 }
 
 };