Change from ClientRect to DOMRect.

third_party/WebKit/Source/core/dom/Range.idl

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 49 matching lines @@
 
     [RaisesException] boolean intersectsNode(Node node);
 
     stringifier;
 
     // CSSOM View Module
     // https://dev.w3.org/csswg/cssom-view/#extensions-to-the-range-interface
     // FIXME: getClientRect() and getBoundingClientRect() should
     // return DOMRectList and DOMRect respectively.
     ClientRectList getClientRects();
-    ClientRect getBoundingClientRect();
+    DOMRect getBoundingClientRect();
 
     // DOM Parsing and Serialization
     // https://w3c.github.io/DOM-Parsing/#extensions-to-the-range-interface
     [NewObject, RaisesException, CEReactions, CustomElementCallbacks] DocumentFragment createContextualFragment(DOMString fragment);
 
     // Non-standard API
     [RaisesException, DeprecateAs=RangeExpand] void expand([Default=Undefined] optional DOMString unit);
 };