[Ozone] Extends the lifetime of VaapiWrapper

content/common/gpu/media/vaapi_wrapper.h

 // 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.
 //
 // This file contains an implementation of VaapiWrapper, used by
 // VaapiVideoDecodeAccelerator and VaapiH264Decoder for decode,
 // and VaapiVideoEncodeAccelerator for encode, to interface
 // with libva (VA-API library for hardware video codec).
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VAAPI_WRAPPER_H_
@@ skipping 25 matching lines @@
 // This class handles VA-API calls and ensures proper locking of VA-API calls
 // to libva, the userspace shim to the HW codec driver. libva is not
 // thread-safe, so we have to perform locking ourselves. This class is fully
 // synchronous and its methods can be called from any thread and may wait on
 // the va_lock_ while other, concurrent calls run.
 //
 // This class is responsible for managing VAAPI connection, contexts and state.
 // It is also responsible for managing and freeing VABuffers (not VASurfaces),
 // which are used to queue parameters and slice data to the HW codec,
 // as well as underlying memory for VASurfaces themselves.
-class CONTENT_EXPORT VaapiWrapper {
+class CONTENT_EXPORT VaapiWrapper : public base::RefCounted<VaapiWrapper> {
  public:
   enum CodecMode {
     kDecode,
     kEncode,
     kCodecModeMax,
   };
 
   // Return an instance of VaapiWrapper initialized for |va_profile| and
   // |mode|. |report_error_to_uma_cb| will be called independently from
   // reporting errors to clients via method return values.
-  static scoped_ptr<VaapiWrapper> Create(
+  static scoped_refptr<VaapiWrapper> Create(
       CodecMode mode,
       VAProfile va_profile,
       const base::Closure& report_error_to_uma_cb);
 
   // Create VaapiWrapper for VideoCodecProfile. It maps VideoCodecProfile
   // |profile| to VAProfile.
   // |report_error_to_uma_cb| will be called independently from reporting
   // errors to clients via method return values.
-  static scoped_ptr<VaapiWrapper> CreateForVideoCodec(
+  static scoped_refptr<VaapiWrapper> CreateForVideoCodec(
       CodecMode mode,
       media::VideoCodecProfile profile,
       const base::Closure& report_error_to_uma_cb);
 
   // Return the supported video encode profiles.
   static media::VideoEncodeAccelerator::SupportedProfiles
       GetSupportedEncodeProfiles();
 
   // Return the supported video decode profiles.
   static media::VideoDecodeAccelerator::SupportedProfiles
@@ skipping 280 matching lines @@
   // Singleton variable to store supported profile information for encode and
   // decode.
   static base::LazyInstance<LazyProfileInfos> profile_infos_;
 
   DISALLOW_COPY_AND_ASSIGN(VaapiWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_WRAPPER_H_