Fix headless_browsertests failures with PlzNavigate.

content/browser/devtools/protocol/network_handler.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "content/browser/devtools/protocol/devtools_domain_handler.h"
 #include "content/browser/devtools/protocol/network.h"
+#include "net/base/net_errors.h"
 #include "net/cookies/canonical_cookie.h"
 
 namespace content {
 
 class DevToolsSession;
 class RenderFrameHostImpl;
+struct BeginNavigationParams;
+struct CommonNavigationParams;
 struct ResourceRequest;
 struct ResourceRequestCompletionStatus;
 struct ResourceResponseHead;
 
 namespace protocol {
 
 class NetworkHandler : public DevToolsDomainHandler,
                        public Network::Backend {
  public:
   NetworkHandler();
@@ skipping 35 matching lines @@
   void NavigationPreloadRequestSent(int worker_version_id,
                                     const std::string& request_id,
                                     const ResourceRequest& request);
   void NavigationPreloadResponseReceived(int worker_version_id,
                                          const std::string& request_id,
                                          const GURL& url,
                                          const ResourceResponseHead& head);
   void NavigationPreloadCompleted(
       const std::string& request_id,
       const ResourceRequestCompletionStatus& completion_status);
+  void NavigationFailed(const CommonNavigationParams& common_params,
+                        const BeginNavigationParams& begin_params,
+                        net::Error error_code);
 
   bool enabled() const { return enabled_; }
   std::string UserAgentOverride() const;
 
  private:
   std::unique_ptr<Network::Frontend> frontend_;
   RenderFrameHostImpl* host_;
   bool enabled_;
   std::string user_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkHandler);
 };
 
 }  // namespace protocol
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_