Stop requiring a reader in MultibufferDataSource::SetBitrateTask()

media/blink/multibuffer_data_source.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 "media/blink/multibuffer_data_source.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 432 matching lines @@
     ReadOperation::Run(std::move(read_op_), kReadError);
 }
 
 void MultibufferDataSource::StopLoader() {
   DCHECK(render_task_runner_->BelongsToCurrentThread());
   reader_.reset(nullptr);
 }
 
 void MultibufferDataSource::SetBitrateTask(int bitrate) {
   DCHECK(render_task_runner_->BelongsToCurrentThread());
-  DCHECK(reader_.get());
 
   bitrate_ = bitrate;
   UpdateBufferSizes();
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // BufferedResourceLoader callback methods.
 void MultibufferDataSource::StartCallback() {
   DCHECK(render_task_runner_->BelongsToCurrentThread());
 
@@ skipping 170 matching lines @@
   reader_->SetPinRange(pin_backward, pin_forward);
 
   if (preload_ == METADATA) {
     reader_->SetPreload(0, 0);
   } else {
     reader_->SetPreload(preload_high, preload);
   }
 }
 
 }  // namespace media