Make DefaultDeleter for Video{De|En}codeAccelerator

content/renderer/media/rtc_video_encoder.cc

 // 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.
 
 #include "content/renderer/media/rtc_video_encoder.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 261 matching lines @@
     return;
   }
 
   if (video_encoder_)
     video_encoder_->RequestEncodingParametersChange(bitrate * 1000, framerate);
 }
 
 void RTCVideoEncoder::Impl::Destroy() {
   DVLOG(3) << "Impl::Destroy()";
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (video_encoder_)
-    video_encoder_.release()->Destroy();
+  video_encoder_.reset();
 }
 
 void RTCVideoEncoder::Impl::RequireBitstreamBuffers(
     unsigned int input_count,
     const gfx::Size& input_coded_size,
     size_t output_buffer_size) {
   DVLOG(3) << "Impl::RequireBitstreamBuffers(): input_count=" << input_count
            << ", input_coded_size=" << input_coded_size.ToString()
            << ", output_buffer_size=" << output_buffer_size;
   DCHECK(thread_checker_.CalledOnValidThread());
@@ skipping 99 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   int32_t retval;
   switch (error) {
     case media::VideoEncodeAccelerator::kInvalidArgumentError:
       retval = WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
       break;
     default:
       retval = WEBRTC_VIDEO_CODEC_ERROR;
   }
 
-  if (video_encoder_)
-    video_encoder_.release()->Destroy();
+  video_encoder_.reset();
 
   if (async_waiter_) {
     SignalAsyncWaiter(retval);
   } else {
     encoder_message_loop_proxy_->PostTask(
         FROM_HERE,
         base::Bind(&RTCVideoEncoder::NotifyError, weak_encoder_, retval));
   }
 }
 
@@ skipping 285 matching lines @@
   UMA_HISTOGRAM_BOOLEAN("Media.RTCVideoEncoderInitEncodeSuccess",
                         init_retval == WEBRTC_VIDEO_CODEC_OK);
   if (init_retval == WEBRTC_VIDEO_CODEC_OK) {
     UMA_HISTOGRAM_ENUMERATION("Media.RTCVideoEncoderProfile",
                               video_codec_profile_,
                               media::VIDEO_CODEC_PROFILE_MAX + 1);
   }
 }
 
 }  // namespace content