Fix the crash for the AudioShared.

ppapi/proxy/plugin_main_irt.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 "ppapi/proxy/plugin_main_irt.h"
 
 #include <unistd.h>
 #include <map>
 #include <set>
 
@@ skipping 298 matching lines @@
 
 }  // namespace
 
 void SetIPCFileDescriptors(int ipc_browser_fd, int ipc_renderer_fd) {
   g_nacl_ipc_browser_fd = ipc_browser_fd;
   g_nacl_ipc_renderer_fd = ipc_renderer_fd;
 }
 
 void PpapiPluginRegisterThreadCreator(
     const struct PP_ThreadFunctions* thread_functions) {
-#if defined(__native_client__)
-  // TODO(hidehiko): The thread creation for the PPB_Audio is not yet
-  // implemented on non-SFI mode. Support this. Now, this function invocation
-  // is just ignored.
-
   // Initialize all classes that need to create threads that call back into
   // user code.
   ppapi::PPB_Audio_Shared::SetThreadFunctions(thread_functions);
-#endif
 }
 
 int PpapiPluginMain() {
   base::MessageLoop loop;
 #if defined(IPC_MESSAGE_LOG_ENABLED)
   IPC::Logging::set_log_function_map(&g_log_function_mapping);
 #endif
   ppapi::proxy::PluginGlobals plugin_globals;
   base::Thread* io_thread = GetNaClIOThread();
 
@@ skipping 11 matching lines @@
   }
 #endif
 
   PpapiDispatcher ppapi_dispatcher(io_thread->message_loop_proxy());
   plugin_globals.set_plugin_proxy_delegate(&ppapi_dispatcher);
 
   loop.Run();
 
   return 0;
 }