Remove isCompositorFramePending plumbing

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index ad01f3807c8729819291c85a6d27a28c9316c741..c196d0836e58614d16e4a655fcb73b550423b881 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -2259,16 +2259,6 @@ void Internals::forceCompositingUpdate(Document* document, ExceptionState& excep
     document->frame()->view()->updateLayoutAndStyleForPainting();
 }
 
-bool Internals::isCompositorFramePending(Document* document, ExceptionState& exceptionState)
-{
-    if (!document || !document->renderView()) {
-        exceptionState.throwDOMException(InvalidAccessError, document ? "The document's render view cannot be retrieved." : "The document provided is invalid.");
-        return false;
-    }
-
-    return document->page()->chrome().client().isCompositorFramePending();
-}
-
 void Internals::setZoomFactor(float factor)
 {
     frame()->setPageZoomFactor(factor);