Allow renderer to create pepper ResourceHosts in the browser

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index 8d9abe6f553442dafcdb8d65537ac9db9103d374..f8ed15f87a442f7edf6b72320b215ffb3df8a5c5 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -1295,6 +1295,28 @@ IPC_SYNC_MESSAGE_CONTROL2_2(PpapiHostMsg_ResourceSyncCall,
     ppapi::proxy::ResourceMessageReplyParams /* reply_params */,
     IPC::Message /* reply_msg */)
 
+// This message is sent from the renderer to the browser when it wants to create
+// a ResourceHost in the browser. It contains the process ID of the plugin and
+// the instance of the plugin for which to create the resource for. params
+// contains the sequence number for the message to track the response.
+// The nested message is a ResourceHost creation message.
+IPC_MESSAGE_CONTROL4(
+    PpapiHostMsg_CreateResourceHostFromHost,
+    int /* child_process_id */,
+    ppapi::proxy::ResourceMessageCallParams /* params */,
+    PP_Instance /* instance */,
+    IPC::Message /* nested_msg */)
+
+// This message is sent from the browser to the renderer when it has created a
+// ResourceHost for the renderer. It contains the sequence number that was sent
+// in the request and the ID of the pending ResourceHost which was created in
+// the browser. This ID is only useful for the plugin which can attach to the
+// ResourceHost in the browser.
+IPC_MESSAGE_CONTROL2(
+    PpapiHostMsg_CreateResourceHostFromHostReply,
+    int32_t /* sequence */,
+    int /* pending_host_id */)
+
 //-----------------------------------------------------------------------------
 // Messages for resources using call/reply above.