Fixing naming issues in MediaSession

content/browser/media/session/media_session_delegate_default.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 "content/browser/media/session/media_session_delegate.h"
-
-#include "base/command_line.h"
-#include "content/browser/media/session/audio_focus_manager.h"
-#include "media/base/media_switches.h"
-
-namespace content {
-
-using AudioFocusType = AudioFocusManager::AudioFocusType;
-
-namespace {
-
-// MediaSessionDelegateDefault is the default implementation of
-// MediaSessionDelegate which only handles audio focus between WebContents.
-class MediaSessionDelegateDefault : public MediaSessionDelegate {
- public:
-  explicit MediaSessionDelegateDefault(MediaSession* media_session);
-  ~MediaSessionDelegateDefault() override;
-
-  // MediaSessionDelegate implementation.
-  bool RequestAudioFocus(
-      AudioFocusManager::AudioFocusType audio_focus_type) override;
-  void AbandonAudioFocus() override;
-
- private:
-  // Weak pointer because |this| is owned by |media_session_|.
-  MediaSession* media_session_;
-};
-
-}  // anonymous namespace
-
-MediaSessionDelegateDefault::MediaSessionDelegateDefault(
-    MediaSession* media_session)
-    : media_session_(media_session) {
-}
-
-MediaSessionDelegateDefault::~MediaSessionDelegateDefault() = default;
-
-bool MediaSessionDelegateDefault::RequestAudioFocus(
-    AudioFocusManager::AudioFocusType audio_focus_type) {
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableDefaultMediaSession)) {
-    return true;
-  }
-
-  AudioFocusManager::GetInstance()->RequestAudioFocus(media_session_,
-                                                      audio_focus_type);
-  return true;
-}
-
-void MediaSessionDelegateDefault::AbandonAudioFocus() {
-  AudioFocusManager::GetInstance()->AbandonAudioFocus(media_session_);
-}
-
-// static
-std::unique_ptr<MediaSessionDelegate> MediaSessionDelegate::Create(
-    MediaSession* media_session) {
-  return std::unique_ptr<MediaSessionDelegate>(
-      new MediaSessionDelegateDefault(media_session));
-}
-
-}  // namespace content