Fix early prerender cancellation not working with PlzNavigate.

chrome/browser/prerender/prerender_handle.cc

Index: chrome/browser/prerender/prerender_handle.cc
diff --git a/chrome/browser/prerender/prerender_handle.cc b/chrome/browser/prerender/prerender_handle.cc
index cdec568d7d60f8ede6745a4da0cc5ea23c0ff992..f15a148802a4889419fa8d979225cd07c09214c1 100644
--- a/chrome/browser/prerender/prerender_handle.cc
+++ b/chrome/browser/prerender/prerender_handle.cc
@@ -48,7 +48,8 @@ void PrerenderHandle::OnCancel() {
 
 bool PrerenderHandle::IsPrerendering() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  return prerender_data_.get() != nullptr;
+  return prerender_data_.get() != nullptr &&
+      !prerender_data_->contents()->prerendering_has_been_cancelled();
 }
 
 bool PrerenderHandle::IsFinishedLoading() const {