PlzNavigate: Show error pages when the navigation failed before commit

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 1723 matching lines @@
   Send(new FrameMsg_CommitNavigation(routing_id_, head, body_url, common_params,
                                      request_params));
   // TODO(clamy): Check if we should start the throbber for non javascript urls
   // here.
 
   // TODO(clamy): Release the stream handle once the renderer has finished
   // reading it.
   stream_handle_ = body.Pass();
 }
 
+void RenderFrameHostImpl::FailedNavigation(
+    const CommonNavigationParams& common_params,
+    const RequestNavigationParams& request_params,
+    bool has_stale_copy_in_cache,
+    int error_code) {
+  // Get back to a clean state, in case a new navigation started without
+  // completing a RFH swap or unload handler.
+  SetState(RenderFrameHostImpl::STATE_DEFAULT);
+
+  Send(new FrameMsg_FailedNavigation(routing_id_, common_params, request_params,
+                                     has_stale_copy_in_cache, error_code));
+}
+
 void RenderFrameHostImpl::SetUpMojoIfNeeded() {
   if (service_registry_.get())
     return;
 
   service_registry_.reset(new ServiceRegistryImpl());
   if (!GetProcess()->GetServiceRegistry())
     return;
 
   RegisterMojoServices();
   RenderFrameSetupPtr setup;
@@ skipping 234 matching lines @@
     return;
 
   permission_manager->RegisterPermissionUsage(
       PermissionType::GEOLOCATION,
       GetLastCommittedURL().GetOrigin(),
       frame_tree_node()->frame_tree()->GetMainFrame()
           ->GetLastCommittedURL().GetOrigin());
 }
 
 }  // namespace content