Convert MIDI permission requests to use WebContents in preparation for switching the code to using …

content/browser/renderer_host/media/midi_dispatcher_host.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/browser/renderer_host/media/midi_dispatcher_host.h"
-
-#include "base/bind.h"
-#include "content/browser/child_process_security_policy_impl.h"
-#include "content/browser/renderer_host/render_view_host_impl.h"
-#include "content/common/media/midi_messages.h"
-#include "content/public/browser/browser_context.h"
-#include "content/public/browser/browser_thread.h"
-#include "url/gurl.h"
-
-namespace content {
-
-MidiDispatcherHost::MidiDispatcherHost(int render_process_id,
-                                       BrowserContext* browser_context)
-    : BrowserMessageFilter(MidiMsgStart),
-      render_process_id_(render_process_id),
-      browser_context_(browser_context) {
-}
-
-MidiDispatcherHost::~MidiDispatcherHost() {
-}
-
-bool MidiDispatcherHost::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(MidiDispatcherHost, message)
-    IPC_MESSAGE_HANDLER(MidiHostMsg_RequestSysExPermission,
-                        OnRequestSysExPermission)
-    IPC_MESSAGE_HANDLER(MidiHostMsg_CancelSysExPermissionRequest,
-                        OnCancelSysExPermissionRequest)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void MidiDispatcherHost::OverrideThreadForMessage(
-    const IPC::Message& message, BrowserThread::ID* thread) {
-  if (IPC_MESSAGE_CLASS(message) == MidiMsgStart)
-    *thread = BrowserThread::UI;
-}
-
-void MidiDispatcherHost::OnRequestSysExPermission(int render_view_id,
-                                                  int bridge_id,
-                                                  const GURL& origin,
-                                                  bool user_gesture) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  browser_context_->RequestMidiSysExPermission(
-      render_process_id_,
-      render_view_id,
-      bridge_id,
-      origin,
-      user_gesture,
-      base::Bind(&MidiDispatcherHost::WasSysExPermissionGranted,
-                 base::Unretained(this),
-                 render_view_id,
-                 bridge_id));
-}
-
-void MidiDispatcherHost::OnCancelSysExPermissionRequest(
-    int render_view_id,
-    int bridge_id,
-    const GURL& requesting_frame) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DVLOG(1) << __FUNCTION__ << " " << render_process_id_ << ":" << render_view_id
-           << ":" << bridge_id;
-  browser_context_->CancelMidiSysExPermissionRequest(
-      render_process_id_, render_view_id, bridge_id, requesting_frame);
-}
-void MidiDispatcherHost::WasSysExPermissionGranted(int render_view_id,
-                                                   int bridge_id,
-                                                   bool is_allowed) {
-  if (is_allowed)
-    ChildProcessSecurityPolicyImpl::GetInstance()->GrantSendMidiSysExMessage(
-        render_process_id_);
-  Send(new MidiMsg_SysExPermissionApproved(
-      render_view_id, bridge_id, is_allowed));
-}
-
-}  // namespace content