Fix early prerender cancellation not working with PlzNavigate.

chrome/browser/prerender/prerender_handle.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_handle.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 30 matching lines @@
 }
 
 void PrerenderHandle::OnCancel() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (prerender_data_)
     prerender_data_->OnHandleCanceled(this);
 }
 
 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 {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return prerender_data_ && prerender_data_->contents()->has_finished_loading();
 }
 
 bool PrerenderHandle::IsAbandoned() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return prerender_data_ && !prerender_data_->abandon_time().is_null();
@@ skipping 54 matching lines @@
     observer_->OnPrerenderStop(this);
 }
 
 bool PrerenderHandle::RepresentingSamePrerenderAs(
     PrerenderHandle* other) const {
   return other && other->prerender_data_ && prerender_data_ &&
          prerender_data_.get() == other->prerender_data_.get();
 }
 
 }  // namespace prerender