Move Position::isRenderedCharacter() for Text node to LayoutText

Source/core/dom/Position.cpp

Index: Source/core/dom/Position.cpp
diff --git a/Source/core/dom/Position.cpp b/Source/core/dom/Position.cpp
index 6044832feb967cc50a6987c71471bd29e55ca214..c6971ec88ae57a1ce5764cdf3e7edf32930db04a 100644
--- a/Source/core/dom/Position.cpp
+++ b/Source/core/dom/Position.cpp
@@ -1016,20 +1016,7 @@ bool PositionAlgorithm<Strategy>::isRenderedCharacter() const
     if (!layoutObject)
         return false;
 
-    const int offset = offsetInContainerNode();
-    LayoutText* textLayoutObject = toLayoutText(layoutObject);
-    for (InlineTextBox* box = textLayoutObject->firstTextBox(); box; box = box->nextTextBox()) {
-        if (offset < static_cast<int>(box->start()) && !textLayoutObject->containsReversedText()) {
-            // The offset we're looking for is before this node
-            // this means the offset must be in content that is
-            // not laid out. Return false.
-            return false;
-        }
-        if (offset >= static_cast<int>(box->start()) && offset < static_cast<int>(box->start() + box->len()))
-            return true;
-    }
-
-    return false;
+    return toLayoutText(layoutObject)->isRenderedCharacter(offsetInContainerNode());
 }
 
 // TODO(yosin) We should move |rendersInDifferentPosition()to "htmlediting.cpp"