Handle certificate generation errors in chromoting host.

remoting/host/plugin/host_script_object.cc

 // 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.
 
 #include "remoting/host/plugin/host_script_object.h"
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
@@ skipping 984 matching lines @@
   DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
 
   if (!success) {
     SetState(kError);
     DisconnectInternal();
     return;
   }
 
   std::string host_secret = GenerateSupportHostSecret();
   std::string access_code = support_id + host_secret;
+
+  std::string local_certificate = host_key_pair_.GenerateCertificate();
+  if (local_certificate.empty()) {
+    LOG(ERROR) << "Failed to generate host certificate.";
+    SetState(kError);
+    DisconnectInternal();
+    return;
+  }
+
   scoped_ptr<protocol::AuthenticatorFactory> factory(
       new protocol::It2MeHostAuthenticatorFactory(
-          host_key_pair_.GenerateCertificate(), *host_key_pair_.private_key(),
-          access_code));
+          local_certificate, *host_key_pair_.private_key(), access_code));
   host_->SetAuthenticatorFactory(factory.Pass());
 
   {
     base::AutoLock lock(access_code_lock_);
     access_code_ = access_code;
     access_code_lifetime_ = lifetime;
   }
 
   SetState(kReceivedAccessCode);
 }
@@ skipping 286 matching lines @@
   return is_good;
 }
 
 void HostNPScriptObject::SetException(const std::string& exception_string) {
   DCHECK(plugin_task_runner_->BelongsToCurrentThread());
   g_npnetscape_funcs->setexception(parent_, exception_string.c_str());
   LOG(INFO) << exception_string;
 }
 
 }  // namespace remoting