Refactor NaClProcessHost. Reduce chances to leak the resource.

components/nacl/renderer/ppb_nacl_private_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 "components/nacl/renderer/ppb_nacl_private_impl.h"
 
 #include <numeric>
 #include <string>
 #include <vector>
 
@@ skipping 367 matching lines @@
                   void* imc_handle,
                   PP_CompletionCallback callback) {
   CHECK(ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->
             BelongsToCurrentThread());
   NaClAppProcessType process_type = PP_ToNaClAppProcessType(pp_process_type);
   // Create the manifest service proxy here, so on error case, it will be
   // destructed (without passing it to ManifestServiceChannel).
   scoped_ptr<ManifestServiceChannel::Delegate> manifest_service_proxy(
       new ManifestServiceProxy(instance, process_type));
 
-  FileDescriptor result_socket;
   IPC::Sender* sender = content::RenderThread::Get();
   DCHECK(sender);
   int routing_id = GetRoutingID(instance);
   NexeLoadManager* load_manager = GetNexeLoadManager(instance);
   DCHECK(load_manager);
   content::PepperPluginInstance* plugin_instance =
       content::PepperPluginInstance::Get(instance);
   DCHECK(plugin_instance);
   if (!routing_id || !load_manager || !plugin_instance) {
     if (nexe_file_info->handle != PP_kInvalidFileHandle) {
@@ skipping 76 matching lines @@
       load_manager->ReportLoadError(PP_NACL_ERROR_SEL_LDR_LAUNCH,
                                     "ServiceRuntime: failed to start",
                                     error_message_string);
     }
     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
         FROM_HERE,
         base::Bind(callback.func, callback.user_data,
                    static_cast<int32_t>(PP_ERROR_FAILED)));
     return;
   }
-  result_socket = launch_result.imc_channel_handle;
+
   instance_info.channel_handle = launch_result.ppapi_ipc_channel_handle;
   instance_info.plugin_pid = launch_result.plugin_pid;
   instance_info.plugin_child_id = launch_result.plugin_child_id;
 
   // Don't save instance_info if channel handle is invalid.
   if (IsValidChannelHandle(instance_info.channel_handle)) {
     NaClPluginInstance* nacl_plugin_instance = GetNaClPluginInstance(instance);
     nacl_plugin_instance->instance_info.reset(new InstanceInfo(instance_info));
   }
 
-  *(static_cast<NaClHandle*>(imc_handle)) = ToNativeHandle(result_socket);
+  *(static_cast<NaClHandle*>(imc_handle)) =
+      IPC::PlatformFileForTransitToPlatformFile(
+          launch_result.imc_channel_handle);
 
   // Store the crash information shared memory handle.
   load_manager->set_crash_info_shmem_handle(
       launch_result.crash_info_shmem_handle);
 
   // Create the trusted plugin channel.
   if (IsValidChannelHandle(launch_result.trusted_ipc_channel_handle)) {
     bool report_exit_status = PP_ToBool(main_service_runtime);
     scoped_ptr<TrustedPluginChannel> trusted_plugin_channel(
         new TrustedPluginChannel(
@@ skipping 1220 matching lines @@
   &StreamPexe
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* GetNaClPrivateInterface() {
   return &nacl_interface;
 }
 
 }  // namespace nacl