media: Add mojo MediaPermission service

media/mojo/services/mojo_media_permission.cc

+// Copyright 2016 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 "media/mojo/services/mojo_media_permission.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "mojo/shell/public/cpp/connect.h"
+#include "mojo/shell/public/interfaces/interface_provider.mojom.h"
+
+namespace media {
+
+namespace {
+
+using MojoType = interfaces::MediaPermission::Type;
+using NativeType = MediaPermission::Type;
+
+MojoType ConvertMediaPermissionType(NativeType type) {
+  switch (type) {
+    case NativeType::PROTECTED_MEDIA_IDENTIFIER:
+      return MojoType::PROTECTED_MEDIA_IDENTIFIER;
+    case NativeType::AUDIO_CAPTURE:
+      return MojoType::AUDIO_CAPTURE;
+    case NativeType::VIDEO_CAPTURE:
+      return MojoType::VIDEO_CAPTURE;
+  }
+  NOTREACHED();
+  return MojoType::PROTECTED_MEDIA_IDENTIFIER;
+}
+
+}  // namespace
+
+MojoMediaPermission::MojoMediaPermission(
+    mojo::shell::mojom::InterfaceProvider* interface_provider)
+    : interface_provider_(interface_provider) {
+  DVLOG(1) << __FUNCTION__;
+}
+
+MojoMediaPermission::~MojoMediaPermission() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+void MojoMediaPermission::HasPermission(
+    Type type,
+    const GURL& security_origin,
+    const PermissionStatusCB& permission_status_cb) {
+  DVLOG(3) << __FUNCTION__;
+  GetMediaPermission()->HasPermission(
+      ConvertMediaPermissionType(type), security_origin.spec(),
+      base::Bind(&MojoMediaPermission::OnPermissionStatus,
+                 base::Unretained(this), permission_status_cb));
+}
+
+void MojoMediaPermission::RequestPermission(
+    Type type,
+    const GURL& security_origin,
+    const PermissionStatusCB& permission_status_cb) {
+  DVLOG(3) << __FUNCTION__;
+
+  GetMediaPermission()->RequestPermission(
+      ConvertMediaPermissionType(type), security_origin.spec(),
+      base::Bind(&MojoMediaPermission::OnPermissionStatus,
+                 base::Unretained(this), permission_status_cb));
+}
+
+interfaces::MediaPermission* MojoMediaPermission::GetMediaPermission() {
+  if (!media_permission_ptr_)
+    mojo::GetInterface(interface_provider_, &media_permission_ptr_);
+
+  return media_permission_ptr_.get();
+}
+
+void MojoMediaPermission::OnPermissionStatus(
+    const base::Callback<void(bool)>& callback,
+    bool success) {
+  callback.Run(success);
+}
+
+}  // namespace media