Revert of Web MIDI: use mojom::blink::PermissionService directly to ask permission

content/renderer/media/midi_dispatcher.cc

Index: content/renderer/media/midi_dispatcher.cc
diff --git a/content/renderer/media/midi_dispatcher.cc b/content/renderer/media/midi_dispatcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f870105dee791f045008c9d36cdd4e0eaf8d4372
--- /dev/null
+++ b/content/renderer/media/midi_dispatcher.cc
@@ -0,0 +1,73 @@
+// 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