Refactor media permission dispatcher class and create proxy class for non-UI threads.

content/renderer/media/media_permission_dispatcher_impl.cc

+// Copyright 2015 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/media_permission_dispatcher_impl.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/thread_task_runner_handle.h"
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/render_frame.h"
+#include "content/renderer/media/media_permission_dispatcher_proxy.h"
+#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
+#include "url/gurl.h"
+
+namespace {
+
+using Type = media::MediaPermission::Type;
+
+content::PermissionName MediaPermissionTypeToPermissionName(Type type) {
+  switch (type) {
+    case Type::PROTECTED_MEDIA_IDENTIFIER:
+      return content::PERMISSION_NAME_PROTECTED_MEDIA_IDENTIFIER;
+    case Type::AUDIO_CAPTURE:
+      return content::PERMISSION_NAME_AUDIO_CAPTURE;
+    case Type::VIDEO_CAPTURE:
+      return content::PERMISSION_NAME_VIDEO_CAPTURE;
+  }
+  NOTREACHED();
+  return content::PERMISSION_NAME_PROTECTED_MEDIA_IDENTIFIER;
+}
+
+}  // namespace
+
+namespace content {
+
+MediaPermissionDispatcherImpl::MediaPermissionDispatcherImpl(
+    RenderFrame* render_frame)
+    : RenderFrameObserver(render_frame),
+      task_runner_(base::ThreadTaskRunnerHandle::Get()),
+      weak_ptr_factory_(this) {}
+
+MediaPermissionDispatcherImpl::~MediaPermissionDispatcherImpl() {
+  DCHECK(thread_checker().CalledOnValidThread());
+}
+
+void MediaPermissionDispatcherImpl::HasPermission(
+    Type type,
+    const GURL& security_origin,
+    const PermissionStatusCB& permission_status_cb) {
+  DCHECK(thread_checker().CalledOnValidThread());
+
+  if (!permission_service_.get()) {
+    render_frame()->GetServiceRegistry()->ConnectToRemoteService(
+        mojo::GetProxy(&permission_service_));
+  }
+
+  permission_service_->HasPermission(
+      MediaPermissionTypeToPermissionName(type), security_origin.spec(),
+      base::Bind(&MediaPermissionDispatcherImpl::OnPermissionStatus,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 RegisterCallback(permission_status_cb)));
+}
+
+void MediaPermissionDispatcherImpl::RequestPermission(
+    Type type,
+    const GURL& security_origin,
+    const PermissionStatusCB& permission_status_cb) {
+  DCHECK(thread_checker().CalledOnValidThread());
+
+  if (!permission_service_.get()) {
+    render_frame()->GetServiceRegistry()->ConnectToRemoteService(
+        mojo::GetProxy(&permission_service_));
+  }
+
+  permission_service_->RequestPermission(
+      MediaPermissionTypeToPermissionName(type), security_origin.spec(),
+      blink::WebUserGestureIndicator::isProcessingUserGesture(),
+      base::Bind(&MediaPermissionDispatcherImpl::OnPermissionStatus,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 RegisterCallback(permission_status_cb)));
+}
+
+scoped_ptr<media::MediaPermission> MediaPermissionDispatcherImpl::CreateProxy(
+    scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner) {
+  scoped_ptr<media::MediaPermission> media_permission_proxy(
+      new MediaPermissionDispatcherProxy(task_runner_, caller_task_runner,
+                                         weak_ptr_factory_.GetWeakPtr()));
+  return media_permission_proxy.Pass();
+}
+
+void MediaPermissionDispatcherImpl::OnPermissionStatus(
+    uint32_t request_id,
+    PermissionStatus status) {
+  DCHECK(thread_checker().CalledOnValidThread());
+  DeliverResult(request_id, status == PERMISSION_STATUS_GRANTED);
+}
+
+}  // namespace content