Implement feature policy checks in the browser process

chrome/browser/media/midi_sysex_permission_context.cc

 // Copyright 2017 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 "chrome/browser/media/midi_sysex_permission_context.h"
 
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/permissions/permission_request_id.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "url/gurl.h"
 
 MidiSysexPermissionContext::MidiSysexPermissionContext(Profile* profile)
-    : PermissionContextBase(profile, CONTENT_SETTINGS_TYPE_MIDI_SYSEX) {}
+    : PermissionContextBase(profile,
+                            CONTENT_SETTINGS_TYPE_MIDI_SYSEX,
+                            blink::WebFeaturePolicyFeature::kMidiFeature) {}
 
 MidiSysexPermissionContext::~MidiSysexPermissionContext() {}
 
 void MidiSysexPermissionContext::UpdateTabContext(const PermissionRequestID& id,
                                                   const GURL& requesting_frame,
                                                   bool allowed) {
   TabSpecificContentSettings* content_settings =
       TabSpecificContentSettings::GetForFrame(id.render_process_id(),
                                               id.render_frame_id());
   if (!content_settings)
     return;
 
   if (allowed) {
     content_settings->OnMidiSysExAccessed(requesting_frame);
 
     content::ChildProcessSecurityPolicy::GetInstance()
         ->GrantSendMidiSysExMessage(id.render_process_id());
   } else {
     content_settings->OnMidiSysExAccessBlocked(requesting_frame);
   }
 }
 
 bool MidiSysexPermissionContext::IsRestrictedToSecureOrigins() const {
   return true;
 }