Reland: Web MIDI: use mojom::blink::PermissionService directly to ask permission

content/renderer/media/midi_dispatcher.cc

-// Copyright 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/renderer/media/midi_dispatcher.h"
-
-#include "base/bind.h"
-#include "content/public/renderer/render_frame.h"
-#include "services/shell/public/cpp/interface_provider.h"
-#include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
-#include "third_party/WebKit/public/web/modules/webmidi/WebMIDIOptions.h"
-#include "third_party/WebKit/public/web/modules/webmidi/WebMIDIPermissionRequest.h"
-
-using blink::WebMIDIPermissionRequest;
-using blink::WebMIDIOptions;
-using blink::WebSecurityOrigin;
-
-namespace content {
-
-MidiDispatcher::MidiDispatcher(RenderFrame* render_frame)
-    : RenderFrameObserver(render_frame) {
-}
-
-MidiDispatcher::~MidiDispatcher() {}
-
-void MidiDispatcher::OnDestruct() {
-  delete this;
-}
-
-void MidiDispatcher::requestPermission(const WebMIDIPermissionRequest& request,
-                                       const WebMIDIOptions& options) {
-  if (!permission_service_.get())
-    render_frame()->GetRemoteInterfaces()->GetInterface(&permission_service_);
-
-  int permission_request_id =
-      requests_.Add(new WebMIDIPermissionRequest(request));
-
-  blink::mojom::PermissionName permission_name =
-      (options.sysex == WebMIDIOptions::SysexPermission::WithSysex)
-          ? blink::mojom::PermissionName::MIDI_SYSEX
-          : blink::mojom::PermissionName::MIDI;
-
-  permission_service_->RequestPermission(
-      permission_name, request.getSecurityOrigin().toString().utf8(),
-      blink::WebUserGestureIndicator::isProcessingUserGesture(),
-      base::Bind(&MidiDispatcher::OnPermissionSet, base::Unretained(this),
-                 permission_request_id));
-}
-
-void MidiDispatcher::cancelPermissionRequest(
-    const WebMIDIPermissionRequest& request) {
-  for (Requests::iterator it(&requests_); !it.IsAtEnd(); it.Advance()) {
-    WebMIDIPermissionRequest* value = it.GetCurrentValue();
-    if (!value->equals(request))
-      continue;
-    requests_.Remove(it.GetCurrentKey());
-    break;
-  }
-}
-
-void MidiDispatcher::OnPermissionSet(int request_id,
-                                     blink::mojom::PermissionStatus status) {
-  // |request| can be NULL when the request is canceled.
-  WebMIDIPermissionRequest* request = requests_.Lookup(request_id);
-  if (!request)
-    return;
-  request->setIsAllowed(status == blink::mojom::PermissionStatus::GRANTED);
-  requests_.Remove(request_id);
-}
-
-}  // namespace content