Add an interface for nacl to create delete-on-close temp files,

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 7825461a5bc20b59a0ae0114c2a73b6b7163c01d..41f6110ad24220d8f6de74bee92012a998f64807 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -495,12 +495,17 @@ IPC_SYNC_MESSAGE_CONTROL2_2(ChromeViewHostMsg_LaunchNaCl,
                                 /* imc channel handles */,
                             IPC::ChannelHandle /* ipc_channel_handle */)
 
-// A renderer sends this to the browser process when it wants to start
+// A renderer sends this to the browser process when it wants to
 // open a file for from the Pnacl component directory.
 IPC_SYNC_MESSAGE_CONTROL1_1(ChromeViewHostMsg_GetReadonlyPnaclFD,
                             std::string /* name of requested PNaCl file */,
                             IPC::PlatformFileForTransit /* output file */)
 
+// A renderer sends this to the browser process when it wants to
+// create a temporary file.
+IPC_SYNC_MESSAGE_CONTROL0_1(ChromeViewHostMsg_NaClCreateTemporaryFile,
+                            IPC::PlatformFileForTransit /* out file */)
+
 // Notification that the page has an OpenSearch description document
 // associated with it.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_PageHasOSDD,