Web MIDI: prepare to pass a security origin from blink to browser

content/renderer/media/midi_message_filter.cc

Index: content/renderer/media/midi_message_filter.cc
diff --git a/content/renderer/media/midi_message_filter.cc b/content/renderer/media/midi_message_filter.cc
index 73b261d4ff50ec666857d101b0de1dd49928fa5c..44738dcd54232ce817b187d8cf4663867fb7f618 100644
--- a/content/renderer/media/midi_message_filter.cc
+++ b/content/renderer/media/midi_message_filter.cc
@@ -65,8 +65,9 @@ void MIDIMessageFilter::OnChannelClosing() {
   channel_ = NULL;
 }
 
-void MIDIMessageFilter::RequestAccess(
-    WebKit::WebMIDIAccessorClient* client, int access) {
+void MIDIMessageFilter::RequestAccess(const std::string& origin,
+                                      WebKit::WebMIDIAccessorClient* client,
+                                      int access) {
   // Generate and keep track of a "client id" which is sent to the browser
   // to ask permission to talk to MIDI hardware.
   // This id is handed back when we receive the answer in OnAccessApproved().
@@ -75,13 +76,15 @@ void MIDIMessageFilter::RequestAccess(
     clients_[client] = client_id;
 
     io_message_loop_->PostTask(FROM_HERE,
-        base::Bind(&MIDIMessageFilter::RequestAccessOnIOThread, this,
+        base::Bind(&MIDIMessageFilter::RequestAccessOnIOThread, this, origin,
                    client_id, access));
   }
 }
 
-void MIDIMessageFilter::RequestAccessOnIOThread(int client_id, int access) {
-  Send(new MIDIHostMsg_RequestAccess(client_id, access));
+void MIDIMessageFilter::RequestAccessOnIOThread(const std::string& origin,
+                                                int client_id,
+                                                int access) {
+  Send(new MIDIHostMsg_RequestAccess(origin, client_id, access));
 }
 
 void MIDIMessageFilter::RemoveClient(WebKit::WebMIDIAccessorClient* client) {