Revert of [blink] Unique pointers in Platform.h

content/renderer/media/renderer_webaudiodevice_impl.cc

Index: content/renderer/media/renderer_webaudiodevice_impl.cc
diff --git a/content/renderer/media/renderer_webaudiodevice_impl.cc b/content/renderer/media/renderer_webaudiodevice_impl.cc
index ef941bec24e00b4c414f38abd6562ecf39c08ba3..2b3d9b7f62f4811e71b4dfcb33b3899cec57579c 100644
--- a/content/renderer/media/renderer_webaudiodevice_impl.cc
+++ b/content/renderer/media/renderer_webaudiodevice_impl.cc
@@ -104,18 +104,17 @@
 
 }  // namespace
 
-std::unique_ptr<RendererWebAudioDeviceImpl> RendererWebAudioDeviceImpl::Create(
+RendererWebAudioDeviceImpl* RendererWebAudioDeviceImpl::Create(
     media::ChannelLayout layout,
     int channels,
     const blink::WebAudioLatencyHint& latency_hint,
     WebAudioDevice::RenderCallback* callback,
     int session_id,
     const url::Origin& security_origin) {
-  return std::unique_ptr<RendererWebAudioDeviceImpl>(
-      new RendererWebAudioDeviceImpl(layout, channels, latency_hint, callback,
-                                     session_id, security_origin,
-                                     base::Bind(&GetOutputDeviceParameters),
-                                     base::Bind(&FrameIdFromCurrentContext)));
+  return new RendererWebAudioDeviceImpl(layout, channels, latency_hint,
+                                        callback, session_id, security_origin,
+                                        base::Bind(&GetOutputDeviceParameters),
+                                        base::Bind(&FrameIdFromCurrentContext));
 }
 
 RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl(