Only send distillability message on valid pipe

components/dom_distiller/content/renderer/distillability_agent.cc

 // Copyright 2015 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 "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 
 #include "components/dom_distiller/content/common/distillability_service.mojom.h"
 #include "components/dom_distiller/content/renderer/distillability_agent.h"
 #include "components/dom_distiller/core/distillable_page_detector.h"
@@ skipping 185 matching lines @@
 
   bool is_loaded = layout_type == WebMeaningfulLayout::FinishedLoading;
   if (!NeedToUpdate(is_loaded)) return;
 
   bool is_last = IsLast(is_loaded);
   // Connect to Mojo service on browser to notify page distillability.
   mojom::DistillabilityServicePtr distillability_service;
   render_frame()->GetRemoteInterfaces()->GetInterface(
       &distillability_service);
   DCHECK(distillability_service);
+  if (!distillability_service.is_bound()) return;
   distillability_service->NotifyIsDistillable(
       IsDistillablePage(doc, is_last), is_last);
 }
 
 DistillabilityAgent::~DistillabilityAgent() {}
 
 void DistillabilityAgent::OnDestruct() {
   delete this;
 }
 
 }  // namespace dom_distiller