Untangle multicol coordinate space conversion from offsetFromContainer().

third_party/WebKit/Source/core/layout/api/LayoutItem.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LayoutItem_h
 #define LayoutItem_h
 
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/layout/LayoutObject.h"
 #include "wtf/Allocator.h"
@@ skipping 121 matching lines @@
     LayoutItem container() const
     {
         return LayoutItem(m_layoutObject->container());
     }
 
     const ComputedStyle& styleRef() const
     {
         return m_layoutObject->styleRef();
     }
 
-    LayoutSize offsetFromContainer(const LayoutItem& item, const LayoutPoint& point, bool* offsetDependsOnPoint = nullptr) const
+    LayoutSize offsetFromContainer(const LayoutItem& item) const
     {
-        return m_layoutObject->offsetFromContainer(item.layoutObject(), point, offsetDependsOnPoint);
+        return m_layoutObject->offsetFromContainer(item.layoutObject());
+    }
+
+    LayoutSize columnOffset(const LayoutPoint& point) const
+    {
+        return m_layoutObject->columnOffset(point);
     }
 
     FrameView* frameView() const
     {
         return m_layoutObject->document().view();
     }
 
     void setMayNeedPaintInvalidation()
     {
         m_layoutObject->setMayNeedPaintInvalidation();
@@ skipping 23 matching lines @@
     LayoutObject* layoutObject() { return m_layoutObject; }
     const LayoutObject* layoutObject() const { return m_layoutObject; }
 
 private:
     LayoutObject* m_layoutObject;
 };
 
 } // namespace blink
 
 #endif // LayoutItem_h