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

content/browser/renderer_host/media/midi_host.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/media/midi_host.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/debug/trace_event.h"
 #include "base/process.h"
@@ skipping 35 matching lines @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(MIDIHost, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(MIDIHostMsg_RequestAccess, OnRequestAccess)
     IPC_MESSAGE_HANDLER(MIDIHostMsg_SendData, OnSendData)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
 
   return handled;
 }
 
-void MIDIHost::OnRequestAccess(int client_id, int access) {
+void MIDIHost::OnRequestAccess(const std::string& origin,
+                               int client_id,
+                               int access) {
+  // TODO(toyoshim): Use |origin| to handle sysex permissions.
+
   MIDIPortInfoList input_ports;
   MIDIPortInfoList output_ports;
 
   // Ask permission and register to receive MIDI data.
   bool approved = false;
   if (midi_manager_) {
     approved = midi_manager_->RequestAccess(this, access);
     if (approved) {
       input_ports = midi_manager_->input_ports();
       output_ports = midi_manager_->output_ports();
@@ skipping 23 matching lines @@
     const uint8* data,
     size_t length,
     double timestamp) {
   TRACE_EVENT0("midi", "MIDIHost::ReceiveMIDIData");
   // Send to the renderer.
   std::vector<uint8> v(data, data + length);
   Send(new MIDIMsg_DataReceived(port_index, v, timestamp));
 }
 
 }  // namespace content