LayoutObject::AbsoluteBoundingBoxRectForRange() should take EphemeralRange

third_party/WebKit/Source/core/editing/FindInPageCoordinates.cpp

 /*
  * Copyright (C) 2012 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 128 matching lines @@
 
     // Jump to the layoutObject owning the frame, if any.
     layout_object = layout_object->GetFrame()
                         ? layout_object->GetFrame()->OwnerLayoutObject()
                         : 0;
   }
 
   return normalized_rect;
 }
 
-FloatRect FindInPageRectFromRange(Range* range) {
-  if (!range || !range->FirstNode())
+FloatRect FindInPageRectFromRange(const EphemeralRange& range) {
+  if (range.IsNull() || !range.StartPosition().NodeAsRangeFirstNode())
+    return FloatRect();
+
+  const LayoutObject* baseLayoutObject =

[yosin_UTC9, 2017/05/24 09:35:51]

nit: s/const LayoutObject*/const LayoutObject* const/

+      range.StartPosition().NodeAsRangeFirstNode()->GetLayoutObject();
+  if (!baseLayoutObject)
     return FloatRect();
 
   return FindInPageRectFromAbsoluteRect(
-      LayoutObject::AbsoluteBoundingBoxRectForRange(range),
-      range->FirstNode()->GetLayoutObject());
+      LayoutObject::AbsoluteBoundingBoxRectForRange(range), baseLayoutObject);
 }
 
 }  // namespace blink