Fix headless_browsertests failures with PlzNavigate.

content/browser/devtools/render_frame_devtools_agent_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 
 #include <map>
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "content/browser/devtools/devtools_agent_host_impl.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "net/base/net_errors.h"
 
 #if defined(OS_ANDROID)
 #include "ui/android/view_android.h"
 #endif  // OS_ANDROID
 
 namespace cc {
 class CompositorFrameMetadata;
 }
 
 #if defined(OS_ANDROID)
@@ skipping 15 matching lines @@
     : public DevToolsAgentHostImpl,
       private WebContentsObserver {
  public:
   static void AddAllAgentHosts(DevToolsAgentHost::List* result);
 
   static void OnCancelPendingNavigation(RenderFrameHost* pending,
                                         RenderFrameHost* current);
   static void OnBeforeNavigation(RenderFrameHost* current,
                                  RenderFrameHost* pending);
   static void OnBeforeNavigation(NavigationHandle* navigation_handle);
+  static void OnFailedNavigation(RenderFrameHost* host, net::Error error_code);
   static std::unique_ptr<NavigationThrottle> CreateThrottleForNavigation(
       NavigationHandle* navigation_handle);
   static bool IsNetworkHandlerEnabled(FrameTreeNode* frame_tree_node);
   static std::string UserAgentOverride(FrameTreeNode* frame_tree_node);
 
   static void WebContentsCreated(WebContents* web_contents);
 
   static void SignalSynchronousSwapCompositorFrame(
       RenderFrameHost* frame_host,
       cc::CompositorFrameMetadata frame_metadata);
@@ skipping 50 matching lines @@
                          RenderFrameHost* render_frame_host) override;
   bool OnMessageReceived(const IPC::Message& message) override;
   void DidAttachInterstitialPage() override;
   void DidDetachInterstitialPage() override;
   void WasShown() override;
   void WasHidden() override;
 
   void AboutToNavigateRenderFrame(RenderFrameHost* old_host,
                                   RenderFrameHost* new_host);
   void AboutToNavigate(NavigationHandle* navigation_handle);
+  void OnFailedNavigation(net::Error error_code);
 
   void DispatchBufferedProtocolMessagesIfNecessary();
 
   void SetPending(RenderFrameHostImpl* host);
   void CommitPending();
   void DiscardPending();
   void UpdateProtocolHandlers(RenderFrameHostImpl* host);
 
   bool IsChildFrame();
 
@@ skipping 48 matching lines @@
 
   // The FrameTreeNode associated with this agent.
   FrameTreeNode* frame_tree_node_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_