Revert of [blink] Unique pointers in Platform.h

content/renderer/media/renderer_webaudiodevice_impl.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_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 15 matching lines @@
 class SilentSinkSuspender;
 }
 
 namespace content {
 class CONTENT_EXPORT RendererWebAudioDeviceImpl
     : NON_EXPORTED_BASE(public blink::WebAudioDevice),
       NON_EXPORTED_BASE(public media::AudioRendererSink::RenderCallback) {
  public:
   ~RendererWebAudioDeviceImpl() override;
 
-  static std::unique_ptr<RendererWebAudioDeviceImpl> Create(
+  static RendererWebAudioDeviceImpl* Create(
       media::ChannelLayout layout,
       int channels,
       const blink::WebAudioLatencyHint& latency_hint,
       blink::WebAudioDevice::RenderCallback* callback,
       int session_id,
       const url::Origin& security_origin);
 
   // blink::WebAudioDevice implementation.
   void Start() override;
   void Stop() override;
@@ skipping 66 matching lines @@
 
   // Allow unit tests to set a custom MediaThreadTaskRunner.
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_