Force compositing inputs to be clean for getBoundingClientRect

third_party/WebKit/Source/core/dom/Element.h

Index: third_party/WebKit/Source/core/dom/Element.h
diff --git a/third_party/WebKit/Source/core/dom/Element.h b/third_party/WebKit/Source/core/dom/Element.h
index b1d8247167de927328c63ad63f1763a4f38fb5f0..db7d55803f0f1a049abc8add2f2d9464e7fdec5d 100644
--- a/third_party/WebKit/Source/core/dom/Element.h
+++ b/third_party/WebKit/Source/core/dom/Element.h
@@ -931,6 +931,11 @@ class CORE_EXPORT Element : public ContainerNode {
   void detachAttrNodeFromElementWithValue(Attr*, const AtomicString& value);
   void detachAttrNodeAtIndex(Attr*, size_t index);
 
+  // Helper method which ensures that compositing inputs have been cleaned.
+  // Cleaning the compositing inputs is required when computing the location of
+  // position:sticky elements or their descendants.
+  void ensureCompositingInputsClean();
+
   v8::Local<v8::Object> wrapCustomElement(
       v8::Isolate*,
       v8::Local<v8::Object> creationContext);