Non-SFI: move socketpair() from plugin process to browser process.

components/nacl/common/nacl_types.h

Index: components/nacl/common/nacl_types.h
diff --git a/components/nacl/common/nacl_types.h b/components/nacl/common/nacl_types.h
index a3b9eec4e7ea82e60bb27a1df0b408f01674723e..32d4c0cccc4b4d1a36562337fcaf8fcc2beb1cf8 100644
--- a/components/nacl/common/nacl_types.h
+++ b/components/nacl/common/nacl_types.h
@@ -81,6 +81,18 @@ struct NaClStartParams {
   IPC::PlatformFileForTransit debug_stub_server_bound_socket;
 #endif
 
+#if defined(OS_LINUX) || defined(OS_NACL_NONSFI)
+  // These are for Non-SFI mode IPC channels.
+  // For security hardening, unlike in SFI mode, we cannot create socket pairs
+  // in a NaCl loader process. Thus, the browser process creates the
+  // ChannelHandle instances, and passes them to the NaCl loader process.
+  // SFI mode uses NaClProcessHostMsg_PpapiChannelsCreated instead.
+  IPC::ChannelHandle ppapi_browser_channel_handle;
+  IPC::ChannelHandle ppapi_renderer_channel_handle;
+  IPC::ChannelHandle trusted_service_channel_handle;
+  IPC::ChannelHandle manifest_service_channel_handle;
+#endif
+
   bool validation_cache_enabled;
   std::string validation_cache_key;
   // Chrome version string. Sending the version string over IPC avoids linkage