Web MIDI: add a new UMA entry for the final result code

content/browser/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/media/midi_host.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/process/process.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 112 matching lines @@
     sent_bytes_in_flight_ += data.size();
   }
   midi_manager_->DispatchSendMidiData(this, port, data, timestamp);
 }
 
 void MidiHost::OnEndSession() {
   is_session_requested_ = false;
   midi_manager_->EndSession(this);
 }
 
-void MidiHost::CompleteStartSession(media::midi::MidiResult result) {
+void MidiHost::CompleteStartSession(media::midi::Result result) {
   DCHECK(is_session_requested_);
-  if (result == media::midi::MIDI_OK) {
+  if (result == media::midi::Result::OK) {
     // ChildSecurityPolicy is set just before OnStartSession by
     // MidiDispatcherHost. So we can safely cache the policy.
     has_sys_ex_permission_ = ChildProcessSecurityPolicyImpl::GetInstance()->
         CanSendMidiSysExMessage(renderer_process_id_);
   }
   Send(new MidiMsg_SessionStarted(result));
 }
 
 void MidiHost::AddInputPort(const media::midi::MidiPortInfo& info) {
   base::AutoLock auto_lock(messages_queues_lock_);
@@ skipping 97 matching lines @@
     }
     waiting_data_length = media::midi::GetMidiMessageLength(current);
     if (waiting_data_length == 0)
       return false;  // Error: |current| should have been a valid status byte.
     --waiting_data_length;  // Found status byte
   }
   return waiting_data_length == 0 && !in_sysex;
 }
 
 }  // namespace content