Force compositing inputs to be clean for getBoundingClientRect

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

Index: third_party/WebKit/Source/core/html/HTMLElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLElement.cpp b/third_party/WebKit/Source/core/html/HTMLElement.cpp
index deaffb100f9afb20f25292e1f32f9b3112c24a82..1ca5128c93c34a823d0bc607e242870d947d6e59 100644
--- a/third_party/WebKit/Source/core/html/HTMLElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLElement.cpp
@@ -1161,6 +1161,7 @@ const AtomicString& HTMLElement::eventParameterName() {
 }
 
 int HTMLElement::offsetLeftForBinding() {
+  ensureCompositingInputsClean();
   Element* offsetParent = unclosedOffsetParent();
   if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
     return adjustLayoutUnitForAbsoluteZoom(
@@ -1171,6 +1172,7 @@ int HTMLElement::offsetLeftForBinding() {
 }
 
 int HTMLElement::offsetTopForBinding() {
+  ensureCompositingInputsClean();
   Element* offsetParent = unclosedOffsetParent();
   if (LayoutBoxModelObject* layoutObject = layoutBoxModelObject())
     return adjustLayoutUnitForAbsoluteZoom(