Make DefaultDeleter for Video{De|En}codeAccelerator

media/cast/video_sender/external_video_encoder.cc

 // Copyright 2014 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 "media/cast/video_sender/external_video_encoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
@@ skipping 113 matching lines @@
 
     // Wait until shared memory is allocated to indicate that encoder is
     // initialized.
   }
 
   // Free the HW.
   void Destroy() {
     DCHECK(encoder_task_runner_);
     DCHECK(encoder_task_runner_->RunsTasksOnCurrentThread());
 
-    if (video_encode_accelerator_) {
-      video_encode_accelerator_.release()->Destroy();
-    }
+    video_encode_accelerator_.reset(NULL);
   }
 
   void SetBitRate(uint32 bit_rate) {
     DCHECK(encoder_task_runner_);
     DCHECK(encoder_task_runner_->RunsTasksOnCurrentThread());
 
     video_encode_accelerator_->RequestEncodingParametersChange(bit_rate,
                                                                max_frame_rate_);
   }
 
@@ skipping 11 matching lines @@
     // BitstreamBufferReady will be called once the encoder is done.
     video_encode_accelerator_->Encode(video_frame, key_frame_requested);
   }
 
  protected:
   virtual void NotifyError(VideoEncodeAccelerator::Error error) OVERRIDE {
     DCHECK(encoder_task_runner_);
     DCHECK(encoder_task_runner_->RunsTasksOnCurrentThread());
     VLOG(1) << "ExternalVideoEncoder NotifyError: " << error;
 
-    if (video_encode_accelerator_) {
-      video_encode_accelerator_.release()->Destroy();
-    }
+    video_encode_accelerator_.reset(NULL);
     cast_environment_->PostTask(
         CastEnvironment::MAIN,
         FROM_HERE,
         base::Bind(&ExternalVideoEncoder::EncoderError, weak_owner_));
   }
 
   // Called to allocate the input and output buffers.
   virtual void RequireBitstreamBuffers(unsigned int input_count,
                                        const gfx::Size& input_coded_size,
                                        size_t output_buffer_size) OVERRIDE {
@@ skipping 258 matching lines @@
   // Do nothing not supported.
 }
 
 int ExternalVideoEncoder::NumberOfSkippedFrames() const {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   return skip_count_;
 }
 
 }  //  namespace cast
 }  //  namespace media