Introduce absoluteCaretBoundsOf() for VisiblePosition

Source/core/editing/VisiblePosition.h

Index: Source/core/editing/VisiblePosition.h
diff --git a/Source/core/editing/VisiblePosition.h b/Source/core/editing/VisiblePosition.h
index d0a4d776bfdb4c053d2d75cee562797e70c3d422..0ed2f100a88bbe52c225d3e8532c81fe216d28aa 100644
--- a/Source/core/editing/VisiblePosition.h
+++ b/Source/core/editing/VisiblePosition.h
@@ -112,8 +112,6 @@ public:
 
     // Rect is local to the returned layoutObject
     LayoutRect localCaretRect(LayoutObject*&) const;
-    // Bounds of (possibly transformed) caret in absolute coords
-    IntRect absoluteCaretBounds() const;
 
     DECLARE_TRACE();
 
@@ -134,6 +132,10 @@ private:
     TextAffinity m_affinity;
 };
 
+// TODO(yosin) We should move |absoluteCaretBoundsOf()| to "VisibleUnits.cpp".
+// Bounds of (possibly transformed) caret in absolute coords
+CORE_EXPORT IntRect absoluteCaretBoundsOf(const VisiblePosition&);
+
 // Abs x/y position of the caret ignoring transforms.
 // TODO(yosin) navigation with transforms should be smarter.
 // TODO(yosin) We should move a glboal funciton