Ensures that audio tasks cannot run after AudioManager is deleted.

content/public/browser/content_browser_client.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/task_scheduler/task_scheduler.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "content/public/browser/certificate_request_result_type.h"
 #include "content/public/browser/navigation_throttle.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/media_stream_request.h"
 #include "content/public/common/resource_type.h"
 #include "content/public/common/service_info.h"
 #include "content/public/common/socket_permission_request.h"
 #include "content/public/common/window_container_type.mojom.h"
-#include "media/audio/audio_manager.h"
 #include "media/media_features.h"
 #include "media/mojo/interfaces/remoting.mojom.h"
 #include "net/base/mime_util.h"
 #include "net/cookies/canonical_cookie.h"
 #include "storage/browser/fileapi/file_system_context.h"
 #include "storage/browser/quota/quota_manager.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/web/window_features.mojom.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/window_open_disposition.h"
@@ skipping 15 matching lines @@
 
 namespace gfx {
 class ImageSkia;
 }
 
 namespace gpu {
 class GpuChannelEstablishFactory;
 }
 
 namespace media {
+class AudioLogFactory;
+class AudioManager;
 class CdmFactory;
 }
 
 namespace service_manager {
 class BinderRegistry;
 class InterfaceRegistry;
 class Service;
 struct ServiceInfo;
 }
 
@@ skipping 691 matching lines @@
 
   // PlzNavigate
   // Called at the start of the navigation to get opaque data the embedder
   // wants to see passed to the corresponding URLRequest on the IO thread.
   virtual std::unique_ptr<NavigationUIData> GetNavigationUIData(
       NavigationHandle* navigation_handle);
 
   // Allows the embedder to provide its own AudioManager implementation.
   // If this function returns nullptr, a default platform implementation
   // will be used.
-  virtual media::ScopedAudioManagerPtr CreateAudioManager(
+  virtual std::unique_ptr<media::AudioManager> CreateAudioManager(
       media::AudioLogFactory* audio_log_factory);
   // Creates and returns a factory used for creating CDM instances for playing
   // protected content.
   virtual std::unique_ptr<media::CdmFactory> CreateCdmFactory();
 
   // Populates |mappings| with all files that need to be mapped before launching
   // a child process.
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   virtual void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
@@ skipping 42 matching lines @@
   virtual bool ShouldRedirectDOMStorageTaskRunner();
 
   // If this returns true, all BrowserThreads (but UI/IO) that support it on
   // this platform will experimentally be redirected to TaskScheduler.
   virtual bool RedirectNonUINonIOBrowserThreadsToTaskScheduler();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_