Force compositing inputs to be clean for getBoundingClientRect

third_party/WebKit/Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004-2008, 2013, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 1143 matching lines @@
     event->setDefaultHandled();
   }
 }
 
 const AtomicString& HTMLElement::eventParameterName() {
   DEFINE_STATIC_LOCAL(const AtomicString, eventString, ("event"));
   return eventString;
 }
 
 int HTMLElement::offsetLeftForBinding() {
+  ensureCompositingInputsClean();
   Element* offsetParent = unclosedOffsetParent();
   if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
     return adjustLayoutUnitForAbsoluteZoom(
                LayoutUnit(layoutObject->pixelSnappedOffsetLeft(offsetParent)),
                layoutObject->styleRef())
         .round();
   return 0;
 }
 
 int HTMLElement::offsetTopForBinding() {
+  ensureCompositingInputsClean();
   Element* offsetParent = unclosedOffsetParent();
   if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
     return adjustLayoutUnitForAbsoluteZoom(
                LayoutUnit(layoutObject->pixelSnappedOffsetTop(offsetParent)),
                layoutObject->styleRef())
         .round();
   return 0;
 }
 
 int HTMLElement::offsetWidthForBinding() {
@@ skipping 31 matching lines @@
 
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(blink::HTMLElement*);
 
 void dumpInnerHTML(blink::HTMLElement* element) {
   printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif