Enable download page action for error page

chrome/renderer/net/net_error_helper.cc

 // Copyright (c) 2013 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/renderer/net/net_error_helper.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 322 matching lines @@
   GetRemoteNetworkDiagnostics()->RunNetworkDiagnostics(page_url);
 }
 
 void NetErrorHelper::DownloadPageLater() {
 #if defined(OS_ANDROID)
   render_frame()->Send(new ChromeViewHostMsg_DownloadPageLater(
       render_frame()->GetRoutingID()));
 #endif  // defined(OS_ANDROID)
 }
 
+void NetErrorHelper::SetIsShowingDownloadButton(bool show) {
+#if defined(OS_ANDROID)
+  render_frame()->Send(
+      new ChromeViewHostMsg_SetIsShowingDownloadButtonInErrorPage(
+          render_frame()->GetRoutingID(), show));
+#endif  // defined(OS_ANDROID)
+}
+
 void NetErrorHelper::OnNetErrorInfo(int status_num) {
   DCHECK(status_num >= 0 && status_num < error_page::DNS_PROBE_MAX);
 
   DVLOG(1) << "Received status " << DnsProbeStatusToString(status_num);
 
   core_->OnNetErrorInfo(static_cast<DnsProbeStatus>(status_num));
 }
 
 void NetErrorHelper::OnSetNavigationCorrectionInfo(
     const GURL& navigation_correction_url,
@@ skipping 25 matching lines @@
 
 void NetErrorHelper::OnNetworkDiagnosticsClientRequest(
     chrome::mojom::NetworkDiagnosticsClientAssociatedRequest request) {
   DCHECK(!network_diagnostics_client_binding_.is_bound());
   network_diagnostics_client_binding_.Bind(std::move(request));
 }
 
 void NetErrorHelper::SetCanShowNetworkDiagnosticsDialog(bool can_show) {
   core_->OnSetCanShowNetworkDiagnosticsDialog(can_show);
 }