Index: ppapi/proxy/ppapi_messages.h |
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h |
index 33d182fadcdf0ad3e45c04b869ee737d61bfd05e..92d6f50c4bacd7aeba1ac04461c6ccb62fc09170 100644 |
--- a/ppapi/proxy/ppapi_messages.h |
+++ b/ppapi/proxy/ppapi_messages.h |
@@ -490,6 +490,8 @@ IPC_MESSAGE_CONTROL2(PpapiMsg_LoadPlugin, |
// Creates a channel to talk to a renderer. The plugin will respond with |
// PpapiHostMsg_ChannelCreated. |
+// If |renderer_pid| is base::kNullProcessId, this is a channel used by the |
+// browser itself. |
IPC_MESSAGE_CONTROL3(PpapiMsg_CreateChannel, |
base::ProcessId /* renderer_pid */, |
int /* renderer_child_id */, |