Handle certificate generation errors in chromoting host.

remoting/host/remoting_me2me_host.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.
 //
 // This file implements a standalone host process for Me2Me.
 
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
@@ skipping 237 matching lines @@
 #if defined(OS_POSIX)
   void ListenForShutdownSignal() {
     remoting::RegisterSignalHandler(
         SIGTERM,
         base::Bind(&HostProcess::SigTermHandler, base::Unretained(this)));
   }
 #endif  // OS_POSIX
 
   void CreateAuthenticatorFactory() {
     DCHECK(context_->network_task_runner()->BelongsToCurrentThread());
+
+    std::string local_certificate = key_pair_.GenerateCertificate();
+    if (local_certificate.empty()) {
+      LOG(ERROR) << "Failed to generate host certificate.";
+      Shutdown(kHostInitializationFailed);
+      return;
+    }
+
     scoped_ptr<protocol::AuthenticatorFactory> factory(
         new protocol::Me2MeHostAuthenticatorFactory(
-            key_pair_.GenerateCertificate(),
-            *key_pair_.private_key(), host_secret_hash_));
+            local_certificate, *key_pair_.private_key(), host_secret_hash_));
     host_->SetAuthenticatorFactory(factory.Pass());
   }
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) {
     DCHECK(context_->ui_task_runner()->BelongsToCurrentThread());
 
 #if defined(REMOTING_MULTI_PROCESS)
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(HostProcess, message)
@@ skipping 534 matching lines @@
             user32.GetFunctionPointer("SetProcessDPIAware"));
     set_process_dpi_aware();
   }
 
   // CommandLine::Init() ignores the passed |argc| and |argv| on Windows getting
   // the command line from GetCommandLineW(), so we can safely pass NULL here.
   return main(0, NULL);
 }
 
 #endif  // defined(OS_WIN)