Test that no crash happens with the CWS error page.

content/browser/frame_host/navigation_request.cc

 // 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.
 
 #include "content/browser/frame_host/navigation_request.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "content/browser/appcache/appcache_navigation_handle.h"
@@ skipping 597 matching lines @@
   RenderFrameHostImpl* render_frame_host = nullptr;
   if (net_error == net::ERR_BLOCKED_BY_CLIENT) {
     render_frame_host = frame_tree_node_->current_frame_host();
   } else {
     render_frame_host =
         frame_tree_node_->render_manager()->GetFrameHostForNavigation(*this);
   }
 
   // Don't ask the renderer to commit an URL if the browser will kill it when
   // it does.
-  DCHECK(render_frame_host->CanCommitURL(common_params_.url));
+  if (!render_frame_host->CanCommitURL(common_params_.url)) {
+    // TODO(arthursonzogni, alexmos): This code should be replaced by
+    // UNREACHED() once the error pages are refactored.
+    // See crbug.com/588314 and crbug.com/622385.
+    common_params_.url = GURL(kUnreachableWebDataURL);

[nasko, 2017/03/22 17:35:22]

This is not something we should do. Charlie, Alex and I discussed what the right
thing for error pages to is, but it is not a simple fix, rather a project on its
own.

+  }
 
   NavigatorImpl::CheckWebUIRendererDoesNotDisplayNormalURL(render_frame_host,
                                                            common_params_.url);
 
   TransferNavigationHandleOwnership(render_frame_host);
   render_frame_host->navigation_handle()->ReadyToCommitNavigation(
       render_frame_host);
   render_frame_host->FailedNavigation(common_params_, begin_params_,
                                       request_params_, has_stale_copy_in_cache,
                                       net_error);
@@ skipping 194 matching lines @@
   DCHECK_EQ(request_params_.has_user_gesture, begin_params_.has_user_gesture);
 
   render_frame_host->CommitNavigation(response_.get(), std::move(body_),
                                       common_params_, request_params_,
                                       is_view_source_);
 
   frame_tree_node_->ResetNavigationRequest(true);
 }
 
 }  // namespace content